Subject: Re: R: hiiiiiiiiii all From: Seisguy@....... Date: Fri, 31 Dec 1999 16:23:21 EST Thanks Dave, that's reassuring fer sure! Just sitting here in a wet Los Angeles waiting for the roll-over WITHOUT incident (bug or otherwise) . Happy New Year to all..... Mike O'Bleness _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Bumps in VBB signal From: S-T Morrissey sean@........... Date: Fri, 31 Dec 1999 15:24:56 -0600 (CST) Barry, Regarding regular periodic bumps in the output of your larger VBB vertical. You mention that they occurr at 5 minute intervals, but you don't say what the period of the event is. So I will assume that it is a single sine (-like?) wave at the operating period, like 60 seconds. This is usually the result of a step in displacement, or a simulation of such in the electronics. To isolate the noise of a seismometer system the obvious method is to clamp the boom or mass so it cannot move and produce real output. This would separate the source possibilities between electronic and mechanical, where mechanical includes the sensor, pier, cover, garage floor concrete slab contracting because it is cold, and the thermostat. Of course, if you have and adjacent seis that doesn't sense the problem, most of these mechanical/environmental sources are eliminated. And if you have two VBB sensors with identical electronics, you can interchange them. Clamping the mass is easy to do with a velocity (moving coil) output system. But any seis with a displacement detector is another matter. Clamping the boom will usually position the detector at an extreme of its range and its electronics will saturate (lock up at a supply voltage). This is ususally not useful since the output is directly coupled. In the triple feedback VBB that you are using, the displacement detector IS the source of the broadband output WHEN the feedback is connected. I don't recall if you are using the VRDT or a capacitive bridge. But clamping a boom so that the detector is at "zero" is quite difficult, especially when "zero" is +,- 0.1 micron, and the detector+amplifier output is 4 volts/micron. Using shims to wedge the sensor to center can create a wide variety of noise, most of which will take days to settle to the micron level. Another test is to remove the sensing vane of the VRDT, which should balance the reactive bridge IF everything else is balanced. This latter is difficult to achieve. I just made another "batch" of VRDT sensors, and after starting with 25 miniature transformers, I ended up with 6 pairs that matched within 0.5 ohm DC, and only one that matched within 1 ohm reactively. Of course, the change caused by the sensing vane still allows a working linear range of several hundred microns at 40 millivolts/micron. For a capacitive sensor, the sensing plate is the output, and can be substituted with a pair of small fixed capacitors if they can be matched. For testing the electronics box, I have an adapter that fits in parallel with the DB-25 connector to the seis that replaces the VRDT coils with their reactive equilavents, namely 365 ohms. The resistors are matched within 0.1 ohm with a meter from a surplus handful of 1% values. Their noise is predominantly thermal, and they produce about 10 times the noise of the earth background. The advantage of this parallel substitution is that the it avoids disturbing the seismometer. I don't know if any of this will help. If you can separate the problem into either mechanical or electronic, it will help. I don't know if the tantalum capacitors can produce spikes if they are operated well within their voltage ratings; and I assume that your DC power supplies are well regulated. Regards, Sean-Thomas _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Time From: "JIM MARTIN" jdmartin@.............. Date: Fri, 31 Dec 1999 16:39:25 -0500 Steve, I would also like to have a copy of RightTime, if you are able to locate it. Just send it to my private e-mail (jdmartin@................ thank you and have a happy new year. Jim Martin New Haven, Indiana ----- Original Message ----- From: steve hammond To: PSN-L Mailing List Sent: Friday, December 31, 1999 12:51 PM Subject: Re: Time > Hi Barry, Happy New Year All-- > Barry, I remember you saying at the PSN meeting you were running a 386. If > you are using the system clock for time keeping than you should also be > running RightTime. The program helps you calculate the clock drift over > several days and then controls it via software. I use it in an AT and over > 11 days can keep the drift down to .026 seconds. If you need it, drop me a > note and I can send you the zip file from the old PSN BBS. > Regards, Steve Hammond, PSN San Jose / Aptos California. > -----Original Message----- > From: barry lotz > To: PSN-L Mailing List > Date: Friday, December 31, 1999 9:31 AM > Subject: Time > > > >This is not directly a seismic question but it does affect event > >recording. If my computer(s) are rebooted after a power outage of as > >little as 1 sec the computer clock is several seconds of . Is there a > >correction for this? > >Barry > > > > > >_____________________________________________________________________ > > > >Public Seismic Network Mailing List (PSN-L) > > > >To leave this list email listserver@.............. with the body of the > >message: leave PSN-L > > > _____________________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email listserver@.............. with the body of the > message: leave PSN-L > _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Lehman design questions From: "JIM MARTIN" jdmartin@.............. Date: Fri, 31 Dec 1999 16:42:08 -0500 To anyone who wishes to help: Is 18" too tall for the main support with the Lehman? Has anyone used a piece of threaded rod for the boom, or is it better to stick with an aluminum dowel, say 1/2" in dia. ? Is the angle of the boom support wire, in relationship to the boom, a critical item, or is it just desirable to keep it somewhere around 30 degrees? Thanks, and sorry for the elementary questions. Jim Martin New Haven, Indiana _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Happy new year! From: ted@.......... Date: Fri, 31 Dec 1999 17:46:51 -0500 Best wishes to everyone from Portsmouth, NH. We are 6 hours from midnight and having a big party in the street (at 20 degrees F!) Hope all your Y2K bug bites are minor ones, see you next millenium. Ted Blank _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Time From: "Dewayne Hill (n0ssy)" n0ssy@.......... Date: Fri, 31 Dec 1999 23:56:15 +0000 You can download an evaluation copy of Rightime from their web site at www.rightime.com. Dewayne >Steve, > >I would also like to have a copy of RightTime, if you are able to locate >it. Just send it to my private e-mail (jdmartin@................ thank you >and have a happy new year. > >Jim Martin >New Haven, Indiana > >----- Original Message ----- >From: steve hammond >To: PSN-L Mailing List >Sent: Friday, December 31, 1999 12:51 PM >Subject: Re: Time > > >> Hi Barry, Happy New Year All-- >> Barry, I remember you saying at the PSN meeting you were running a 386. If >> you are using the system clock for time keeping than you should also be >> running RightTime. The program helps you calculate the clock drift over >> several days and then controls it via software. I use it in an AT and over >> 11 days can keep the drift down to .026 seconds. If you need it, drop me a >> note and I can send you the zip file from the old PSN BBS. >> Regards, Steve Hammond, PSN San Jose / Aptos California. >> -----Original Message----- >> From: barry lotz >> To: PSN-L Mailing List >> Date: Friday, December 31, 1999 9:31 AM >> Subject: Time >> >> >> >This is not directly a seismic question but it does affect event >> >recording. If my computer(s) are rebooted after a power outage of as >> >little as 1 sec the computer clock is several seconds of . Is there a >> >correction for this? >> >Barry >> > >> > >> >_____________________________________________________________________ >> > >> >Public Seismic Network Mailing List (PSN-L) >> > >> >To leave this list email listserver@.............. with the body of the >> >message: leave PSN-L >> >> >> _____________________________________________________________________ >> >> Public Seismic Network Mailing List (PSN-L) >> >> To leave this list email listserver@.............. with the body of the >> message: leave PSN-L >> > > >_____________________________________________________________________ > >Public Seismic Network Mailing List (PSN-L) > >To leave this list email listserver@.............. with the body of the >message: leave PSN-L > > Dewayne Hill (n0ssy) Westminster, Colorado USA 39.83569n 105.0627w Elev. 5660ft. _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Lehman design questions From: JIm Hannon jmhannon@........ Date: Fri, 31 Dec 1999 19:12:58 -0600 JIM MARTIN wrote: > To anyone who wishes to help: > > Is 18" too tall for the main support with the Lehman? > > Has anyone used a piece of threaded rod for the boom, or is it better to > stick with an aluminum dowel, say 1/2" in dia. ? > > Is the angle of the boom support wire, in relationship to the boom, a > critical item, or is it just desirable to keep it somewhere around 30 > degrees? > > Thanks, and sorry for the elementary questions. > > Jim Martin > New Haven, Indiana > It is best to avoid all magnetic materials in and on the boom. If your threaded rod is steel I would not use it. Otherwise it is a matter of mechanical stability and not having stray mechanical resonances in the system. In other words stiffer is better. The other dimensions are not critical. Except the location of the upper and lower pivot points. The upper pivot, when adjusted for proper period is slightly closer to the mass in the horizontal direction than the lower pivot point. Normally this adjustment is made with the levelling screws on the base. So if you build the pivots to be vertical when the base is horizontal the correct adjustment can be made by slightly inclining the base down at the mass end. -- Jim Hannon http://soli.inav.net/~jmhannon/ 42,11.90N,91,39.26W WB0TXL _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: RighTime From: "JIM MARTIN" jdmartin@.............. Date: Fri, 31 Dec 1999 21:12:49 -0500 Is anyone out there running RighTime with either the SDR software package or with the EMON software? Just curious if RighTime is causing any problems with the interrupts. Thanks.... Jim Martin New Haven, Indiana _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Lehman design questions From: "Ed Thelen" ethelen@........ Date: Fri, 31 Dec 1999 20:02:51 -0800 ----- Original Message ----- > > Has anyone used a piece of threaded rod for the boom, or is it better to > > stick with an aluminum dowel, say 1/2" in dia. ? Keep thinking "center of mass", "center of mass", "center of mass", ... And you want the "center of mass" as far as practical from the pivot. Any mass not as far from the pivot is bad - it brings the "center of mass" towards the pivot and shortens the period with no advantages gained. (Let's not get into center of gyration - same principles apply) So - a hollow boom is good - And of course the boom and supports must also be - stiff (raise its resonant frequency above some cutoff) - non-magnetic (you have enough trouble with out stray magnetic attractions confusing you further) - stable, ... so aluminum or copper tubing are among the better choices. I'm biased of course, my all time favorite long period horizontal was made of 1" rigid copper tubing soldered on the family gas stove. Your wife should be so understanding and patient. A small propane torch is probably technically and politically better! _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: RighTime From: ted@.......... Date: Sat, 1 Jan 2000 00:56:31 -0500 I've run RighTime with EMON for years without any problem. SDR may be a bit more picky, as it depends on reliably receiving timing interrupts, but Larry will be the final word on that. Ted Blank "JIM MARTIN" on 12/31/99 09:12:49 PM Please respond to PSN-L Mailing List To: cc: Subject: RighTime Is anyone out there running RighTime with either the SDR software package or with the EMON software? Just curious if RighTime is causing any problems with the interrupts. Thanks.... Jim Martin New Haven, Indiana _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Comma's From: n0cwr@......... Date: Sat, 01 Jan 2000 15:02:45 +0000 I was Ctrl R 'ing SDR from last night looking over last nights data and I seen a small event of some sort at 11:15z or so this morning. Nothing on NEIC. But... When I do a save it saves the file my network drive but when I use Winquake (v2.4) it shows the file with a comma in front and won't read the data. By going in and looking at the files and even trying to rename they show no comma at the start in DOS or WINNT, but they still end up showing a comma at the start of the filename in Winquake and naturally can't be read. I guess because it's not the right filename ,000101D.ks1 I've been fooling with this for about an hour, maybe I'm just groggy from working last night, but any one know what gives? I'm giving up and will try again later. Kevin N0CWR _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Comma's From: Dick Webb dwebb2@.............. Date: Sat, 01 Jan 2000 10:11:08 -0500 Kevin, I can't answer your question but did see the event you mentioned. It arrived in Raleigh at 11:23:08 UTC and seemed to be about 710 miles away. When did you see it, where are you and what was your distance estimate? Thanks, Dick At 03:02 PM 01/01/2000 +0000, you wrote: >I was Ctrl R 'ing SDR from last night looking over last nights data and >I seen a small event of some sort at 11:15z or so this morning. Nothing on >NEIC. >But... >When I do a save it saves the file my network drive but when I use Winquake >(v2.4) >it shows the file with a comma in front and won't read the data. >By going in and looking at the files and even trying to rename they show >no comma at the start in DOS or WINNT, but they still end up showing a >comma at the start of the filename in Winquake and naturally can't be read. >I guess because it's not the right filename ,000101D.ks1 >I've been fooling with this for about an hour, maybe I'm just groggy from >working last night, but any one know what gives? I'm giving up and will try >again later. > >Kevin >N0CWR > >_____________________________________________________________________ > >Public Seismic Network Mailing List (PSN-L) > >To leave this list email listserver@.............. with the body of the >message: leave PSN-L _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Comma's (5.2 at Temiscaming, Quebec) From: Dgw5319@....... Date: Sat, 1 Jan 2000 10:33:02 EST Kevin Looks like a magnitude 5.2 at 11:22 UTC near Temiscaming, Quebec. Here is a link at Natural Resources Canada; Earthquake Report Dave _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Comma's From: n0cwr@......... Date: Sat, 01 Jan 2000 15:41:13 +0000 Hi Dick I think the servers where shutdown at NEIC! :) I can not get Winquake on either a WIN95 or WINNT PC to read my SDR files even when changing the file save to floppy, so I can't say for sure just reading SDR. I even tried the new unregistered version of Winquake D/L'd and same results. I thought I would try to reload my old original version of SDR in another directory instead of SDRv2.7 next. Weird! But it looks like about the same time on SDR by changing the start time aligning the start with my time entered I start to see data at 11:28 My guess would have to be New Madrid, between us? What do you think? I am in Leavenworth, Ks. Appears to be a relatively small event! I went into work checking PC's last night, and frankly not so much in the mood for more troubleshooting this morning. Probably something stupid, so am even ready for a "hey dummy it's...." At 10:11 AM 1/1/00 -0500, Dick Webb wrote: >Kevin, > >I can't answer your question but did see the event you mentioned. It >arrived in Raleigh at 11:23:08 UTC and seemed to be about 710 miles >away. When did you see it, where are you and what was your distance estimate? > >Thanks, >Dick > > > >At 03:02 PM 01/01/2000 +0000, you wrote: >>I was Ctrl R 'ing SDR from last night looking over last nights data and >>I seen a small event of some sort at 11:15z or so this morning. Nothing on >>NEIC. >>But... >>When I do a save it saves the file my network drive but when I use Winquake >>(v2.4) >>it shows the file with a comma in front and won't read the data. >>By going in and looking at the files and even trying to rename they show >>no comma at the start in DOS or WINNT, but they still end up showing a >>comma at the start of the filename in Winquake and naturally can't be read. >>I guess because it's not the right filename ,000101D.ks1 >>I've been fooling with this for about an hour, maybe I'm just groggy from >>working last night, but any one know what gives? I'm giving up and will try >>again later. >> >>Kevin >>N0CWR >> >>_____________________________________________________________________ >> >>Public Seismic Network Mailing List (PSN-L) >> >>To leave this list email listserver@.............. with the body of the >>message: leave PSN-L > > >_____________________________________________________________________ > >Public Seismic Network Mailing List (PSN-L) > >To leave this list email listserver@.............. with the body of the >message: leave PSN-L > > _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Comma's From: Dick Webb dwebb2@.............. Date: Sat, 01 Jan 2000 10:57:10 -0500 Kevin and Dave, Well, I had a 50/50 chance of calling it New Madrid or Quebec since both are about 700 miles from here. Actually, if I had checked the real time helicorder site at CERI I would have seen that they detected little. I am using a restored WWSSN vertical and horizontal long period oriented NS. If I had only gotten the other EW unit installed, I suppose I could have distinguished them from the shape of the emerging wave shapes. Next time. Dave, thanks for directing me to the Canadian site. Looks great and fast. Dick At 03:41 PM 01/01/2000 +0000, you wrote: >Hi Dick >I think the servers where shutdown at NEIC! :) > >I can not get Winquake on either a WIN95 or WINNT PC to read my SDR files >even when changing the file save to floppy, so I can't say for sure just >reading SDR. I even tried the new unregistered version of Winquake D/L'd and >same results. I thought I would try to reload my old original version of SDR >in another directory instead of SDRv2.7 next. Weird! > >But it looks like about the same time on SDR by changing the start time >aligning the start with my time entered I start to see data at 11:28 >My guess would have to be New Madrid, between us? What do you think? > >I am in Leavenworth, Ks. > >Appears to be a relatively small event! > >I went into work checking PC's last night, and frankly not so much in the >mood for more troubleshooting this morning. Probably something stupid, so >am even ready for a "hey dummy it's...." > > >At 10:11 AM 1/1/00 -0500, Dick Webb wrote: > >Kevin, > > > >I can't answer your question but did see the event you mentioned. It > >arrived in Raleigh at 11:23:08 UTC and seemed to be about 710 miles > >away. When did you see it, where are you and what was your distance >estimate? > > > >Thanks, > >Dick > > > > > > > >At 03:02 PM 01/01/2000 +0000, you wrote: > >>I was Ctrl R 'ing SDR from last night looking over last nights data and > >>I seen a small event of some sort at 11:15z or so this morning. Nothing on > >>NEIC. > >>But... > >>When I do a save it saves the file my network drive but when I use Winquake > >>(v2.4) > >>it shows the file with a comma in front and won't read the data. > >>By going in and looking at the files and even trying to rename they show > >>no comma at the start in DOS or WINNT, but they still end up showing a > >>comma at the start of the filename in Winquake and naturally can't be read. > >>I guess because it's not the right filename ,000101D.ks1 > >>I've been fooling with this for about an hour, maybe I'm just groggy from > >>working last night, but any one know what gives? I'm giving up and will try > >>again later. > >> > >>Kevin > >>N0CWR > >> > >>_____________________________________________________________________ > >> > >>Public Seismic Network Mailing List (PSN-L) > >> > >>To leave this list email listserver@.............. with the body of the > >>message: leave PSN-L > > > > > >_____________________________________________________________________ > > > >Public Seismic Network Mailing List (PSN-L) > > > >To leave this list email listserver@.............. with the body of the > >message: leave PSN-L > > > > > >_____________________________________________________________________ > >Public Seismic Network Mailing List (PSN-L) > >To leave this list email listserver@.............. with the body of the >message: leave PSN-L _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Comma's From: meredith lamb mlamb1@.......... Date: Sat, 01 Jan 2000 09:19:38 -0800 n0cwr@......... wrote: > I do a save it saves the file my network drive but when I use Winquake > (v2.4) > it shows the file with a comma in front and won't read the data. > By going in and looking at the files and even trying to rename they show > no comma at the start in DOS or WINNT, but they still end up showing a > comma at the start of the filename in Winquake and naturally can't be read. > I guess because it's not the right filename ,000101D.ks1 > Kevin > N0CWR Kevin, I figure it must be a Y2K computer problem. My old (circa 1993?) Packard Bell computer does essentially the same thing but with the addition of a digit: ,1000101a.ml1 It did crash on the stroke of Y2K, even though it had a patch, but Packard Bell said it wouldn't be able to keep running constantly with a program that runs all the time. Same results, the floppy names can't be changed via the normal name change route, and the Winquake program says its not there, and pressing the issue crashes the program. There maybe some kind of work-a-round, but the only one I can think of (for future use) is too reset the computer clock to the year 1976 (could be 1978), where the dates match the year 2000. One could then possibly see the data, but, whether the floppy date can be then changed, and then successfully submitted as a PSN event is conjecture for me at this time. Your present Canadian quake is probably "scrap" (me too), but future quakes "maybe" readable. Unfortunately I'am no computer whiz, so, other means maybe available....but the experience is wholly lacking to suggest anything otherwise. Of course, getting another computer thats compliant is obvious. Outside of this setback, Happy New Year anyway..... Meredith Lamb _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Comma's From: meredith lamb mlamb1@.......... Date: Sat, 01 Jan 2000 09:39:41 -0800 Y2K non-compliant computers additional note. Apparently Microsoft Windows doesn't go back year wise to 1976. However the year 1983 matches the month of January 2000. One might have to reset the year date to match the month for 2000 every month, via the Windows Date/Time function. I would think recording, and then changing the dates would work (for submission to PSN event files). Meredith Lamb _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Comma's From: n0cwr@......... Date: Sat, 01 Jan 2000 17:11:27 +0000 I don't think I am detecting any problems with any other files. I've just come back in and tried a few things. All else looks ok. Other file saves are fine. All other files seem to execute through the network when I run them off the PC when running the SDR PC on GUI Win95. At this point I just don't think I am detecting any problems with any other files. It seems that I can do everything file-wise with this WIN95 (the SDR OS) and then be able to work with them on either the other network WIN95 or WINNT PC. Floppy transfer or via network. And the clock does appear ok. I also have a WIN3.11 PC on the network, but it doesn't have any Winqake or SDR software on it, so I haven't tried it with these files. So...my thinking is that the problem may be with the way SDR is saving the file only and the way it is being read by Winquake. With the comma, one of the first things I considered was some sort of virus. Maybe changing the way Winquake viewed these files with some sort of extra data inserted by a virus. But Norton Anti Virus comes up clean with yesterdays updates. I have in my mind that we may not be alone on this, and bet as soon as Larry comes alive from last night he may be able to point us to a fix. Here's hoping anyway. I'm really thinking that for some reason SDR is writing it's file in a way that Winquake interpets it wrong. (sounds like a virus doesn't it) Like adding a string to the file! I've pumped in some breakfast and buckets of coffee so now I've got to go help a guy install a DSS dish. Will keep my fingers crossed for that easy fix! Bet I sleep like a baby tonight! A bit sleep deprived. If anyone has Winquake functioning, I'd like to send them my file to see if they can read it. I did considered just sending it to PSN but maybe a bit dangerous to see if it would convert there ok to html. Better to test and wait. Happy New Year all. Kevin N0CWR At 09:39 AM 1/1/00 -0800, you wrote: >Y2K non-compliant computers additional note. > >Apparently Microsoft Windows doesn't go back year wise >to 1976. However the year 1983 matches the month of >January 2000. One might have to reset the year date to >match the month for 2000 every month, via the Windows >Date/Time function. > >I would think recording, and then changing the dates would >work (for submission to PSN event files). > >Meredith Lamb > > > > > > > >_____________________________________________________________________ > >Public Seismic Network Mailing List (PSN-L) > >To leave this list email listserver@.............. with the body of the >message: leave PSN-L > > _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Comma's From: Karl Cunningham karlc@....... Date: Sat, 01 Jan 2000 09:57:50 -0800 Hi All -- My Winquake v2.68 (under NT4 SP3) and SDR v2.71 (under Win95) seem to be working just fine. I've retrieved several event files and replay requests from SDR via network with Winquake with no problems. These include events before and after the date rollover. I didn't try one spanning the rollover. My SDR machine is using UTC with no offset. I don't know if this is related, but in that ASCII table, a comma is 44 (decimal) and '0' is 48. My SDR machine is an old 486 (Shuttle motherboard). I did some Y2K testing a while back and found that if I turned the machine off just prior to the rollover, then turned it on just after and reset the date in BIOS, everything works just fine. You might try rebooting the computer and setting the date using BIOS setup. In earlier testing, I found that an older version of SDR will erase its saved data files if the system date is vastly different from the date of the data files. Such as if the system date is 1980 and the data files are 1999. Larry may have changed this in more recent versions. One trick to renaming files is to copy the file to a floppy disk and make sure the file you want to rename is the only one on the floppy. Then use the DOS command REN *.* newname.ext This will rename the file even if the name contains illegal characters. We used to do this in the old DOS days if a filename got corrupted. If someone wants to send me a file, I'll be happy to try to read it with Winquake. Send it to me directly, not to the list. Regards, Karl At 05:11 PM 1/1/2000 +0000, you wrote: >I don't think I am detecting any problems with any other files. >I've just come back in and tried a few things. All else looks ok. >Other file saves are fine. >All other files seem to execute through the network when I run them off the >PC when running the SDR PC on GUI Win95. > >At this point I just don't think I am detecting any problems with any >other files. > >It seems that I can do everything file-wise with this WIN95 (the SDR OS) >and then be able to work with them on either the other network WIN95 or >WINNT PC. Floppy transfer or via network. >And the clock does appear ok. > >I also have a WIN3.11 PC on the network, but it doesn't have any Winqake >or SDR software on it, so I haven't tried it with these files. > >So...my thinking is that the problem may be with the way SDR is saving the >file >only and the way it is being read by Winquake. > >With the comma, one of the first things I considered was some sort of virus. >Maybe changing the way Winquake viewed these files with some sort of extra >data inserted by a virus. But Norton Anti Virus comes up clean >with yesterdays updates. > >I have in my mind that we may not be alone on this, and bet as soon as >Larry comes alive from last night he may be able to point us to a fix. >Here's hoping anyway. I'm really thinking that for some reason SDR is writing >it's file in a way that Winquake interpets it wrong. (sounds like a virus >doesn't it) >Like adding a string to the file! > >I've pumped in some breakfast and buckets of coffee so now I've got to go >help a guy install a DSS dish. Will keep my fingers crossed for that easy >fix! Bet I sleep like a baby tonight! A bit sleep deprived. > >If anyone has Winquake functioning, I'd like to send them my file to >see if they can read it. I did considered just sending it to PSN but maybe >a bit dangerous to see if it would convert there ok to html. Better to test >and >wait. > >Happy New Year all. >Kevin >N0CWR > >At 09:39 AM 1/1/00 -0800, you wrote: >>Y2K non-compliant computers additional note. >> >>Apparently Microsoft Windows doesn't go back year wise >>to 1976. However the year 1983 matches the month of >>January 2000. One might have to reset the year date to >>match the month for 2000 every month, via the Windows >>Date/Time function. >> >>I would think recording, and then changing the dates would >>work (for submission to PSN event files). >> >>Meredith Lamb >> >> >> >> >> >> >> >>_____________________________________________________________________ >> >>Public Seismic Network Mailing List (PSN-L) >> >>To leave this list email listserver@.............. with the body of the >>message: leave PSN-L >> >> > >_____________________________________________________________________ > >Public Seismic Network Mailing List (PSN-L) > >To leave this list email listserver@.............. with the body of the >message: leave PSN-L > > _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Y2K Bug From: The Lahrs JohnJan@........ Date: Sat, 01 Jan 2000 11:12:58 -0700 >The first Y2K bug I've noticed is with the NEIC Bigquake message! The message reads: The following is from the United States Geological Survey, National Earthquake Information Center: preliminary hypocenter for earthquake of 1900 jan 01, WEST OF MACQUARIE ISLAND, about 475 miles (770 km) NW of Young Island, Balleny Islands: latitude 60.8 degrees south longitude 153.6 degrees east origin time 05 58 19.1 utc depth shallow, magnitude 5.6 ms. Apparently the error is in the program that generates this text, as the database itself keeps the full 4-digit year. NEIC is now working on the problem, so it should be fixed soon. John * John C. and Jan H. Lahr * * JohnJan@........ * * 1925 Foothills Road * * Golden, Colorado 80401-1718 * * (303) 215-9913 * * http://lahr.org/john-jan * * http://giseis.alaska.edu/lahr * _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Comma's From: david wolny dwolny@............. Date: Sat, 1 Jan 2000 12:49:26 -0700 (MST) Kevin I too recorded the Quebec event. I can see it in SDR, but Winquake won't read the file. That darn comma at the front of the file name. I tried renaming the file but to no avail. I have SDR running in DOS on an old 486. Strange, the computer has the date correctly, 01/01/2000. I guess I will try Karl's suggestion of renaming the file in the DOS program. Dave _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Y2K Bug From: macsmith macsmith@......... Date: Sat, 01 Jan 2000 09:53:56 -1000 The USGS Hawaii List seems to have gone slightly bannanas listing every quake since March 1998 - quite useful! http://quake.wr.usgs.gov/cgi-bin/finger?quake@................ _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Comma's From: n0cwr@......... Date: Sat, 01 Jan 2000 20:02:29 +0000 Thanks. So, probably not a virus. Winquake or SDR interpretation of all the zeros in the date? My guess? Whats the date in binary? At 12:49 PM 1/1/00 -0700, you wrote: >Kevin > >I too recorded the Quebec event. I can see it in SDR, but Winquake won't >read the file. That darn comma at the front of the file name. I tried >renaming the file but to no avail. I have SDR running in DOS on an old >486. Strange, the computer has the date correctly, 01/01/2000. I guess I >will try Karl's suggestion of renaming the file in the DOS program. > >Dave > > > >_____________________________________________________________________ > >Public Seismic Network Mailing List (PSN-L) > >To leave this list email listserver@.............. with the body of the >message: leave PSN-L > > _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Comma's From: n0cwr@......... Date: Sat, 01 Jan 2000 20:17:35 +0000 In the meantime... I set my F6 "purge Record files" to 14 days. To save my records. You might try the same to till we come up with a solution. My thoughts are now leaning toward the way SDR might save date info in it's save file using older AMIbios even though the OS made the date transfer ok to 2000. I have system commander on that PC and date appears ok even in running DOS 6.22. SDR save in DOS6.22 on that PC and then lookup in Winquake displays the same. Comma and unable to locate the file due to the comma. I haven't tried reloading the old version I have of SDR yet. What version are you using? At 12:49 PM 1/1/00 -0700, you wrote: >Kevin > >I too recorded the Quebec event. I can see it in SDR, but Winquake won't >read the file. That darn comma at the front of the file name. I tried >renaming the file but to no avail. I have SDR running in DOS on an old >486. Strange, the computer has the date correctly, 01/01/2000. I guess I >will try Karl's suggestion of renaming the file in the DOS program. > >Dave > > > >_____________________________________________________________________ > >Public Seismic Network Mailing List (PSN-L) > >To leave this list email listserver@.............. with the body of the >message: leave PSN-L > > _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Y2K Bug From: Canie canie@........... Date: Sat, 01 Jan 2000 12:25:55 -0800 Something similar seems to have happened at this site: http://www.cnss.org/us.epi.gif - Map of US quakes Canie At 09:53 AM 1/1/00 -1000, you wrote: >The USGS Hawaii List seems to have gone slightly bannanas listing every >quake since March 1998 - quite useful! > >http://quake.wr.usgs.gov/cgi-bin/finger?quake@................ _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Seismographs for students From: Ruediger Wisskirchen rwisskirchen@....... Date: Sat, 01 Jan 2000 22:52:28 +0200 barry lotz wrote: > Ruediger > It may work as a strong motion sensor. I agree with Ted, usually you want > the natural period of the sensor to be longer than the lowest period you want > to record. Also since the output would be a function of the # of wire coils > turns you may have a very low output signal . Speakers usually have few turns. But is it possible, that the strong magnet more than compensats this disadvantage? A simple test with a big loudspeaker, a simple amplifier with a 741 and amp.factor 100 gives a strong signal, when I just make a bit wind with my hand against the membran. > > What you describe maybe the begining of a force balance sensor but you would > need a displacement sensor included which would complicate matters. I have read the article about the force-balance-seismometer, but due to my oor english I haven`t quite understood the difference between the forcebalance and the lehman-sensor. Why do you need a displacement sensor? > Do you have > access to magnet wire and simple rectangular magnets? You could use an electric > drill and wind your own coil of 1000+ turns on say a old spool like an empty > solder spool. Is it better for a high voltage to have a short coil with much layers or does a long coil with the same number of wires produeces the same effect? > You could then put a rectangular magnet on both sides of the > coil. As Ted says you probable will have more interesting events if you do not > attach the groung to the end of the boom except as I have described above. I > hope this helps a little. Most of us look around to find possible sensor > parts from devices use for other things, for example computer harddrive driver > as sensor/coil pairs. I still have some old harddisks, thanks for that hint. > > Barry > > ted@.......... wrote: > Thanks Ruediger Wisskirchen (rwisskirchen@........ _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Comma's From: n0cwr@......... Date: Sat, 01 Jan 2000 20:54:22 +0000 Thanks for checking Karl. Those were the right files. In that case! I am totally confused. No. The files look fine in everything except when I look at them with Winquake 2.4 using two different PC's. They appear when viewed in Winquake. I don't see a thing wrong with the file name in DOS or WIN OS's. So now I'm wondering, what does this mean? I'm confused and will have to think about this some more. I hope you don't mind. I'm going to cc: this to the list so that other(s) with trouble might see. May need to get more info from other user just responded with same trouble. thanks again. At 12:29 PM 1/1/00 -0800, you wrote: >Kevin -- > >The files attached to your email were 000101a.ks1 and 000101b.ks1. I don't >know if you tried to send the ones that started with a comma, but when they >got here they had no comma in the file name. > >I can open both files just fine with Winquake (v2.6.8). Both appear to be >identical, starting at 11:20:36 on 1/1/00. > >If the filenames you sent started with commas, you might try sending the >files to yourself via email. Maybe that'll strip the commas off. > >Next interesting thing: I renamed the files (using NT4 SP3) and added a >comma to the beginning of both the file names. Winquake still opened the >files without complaint, comma and all. I've attached a .GIF file, which >is a screen dump of Winquake with the ,000101a.ks1 file open. Maybe your >files have more than just a comma at the start. Maybe there are some >hidden characters too. Do you have a program that can do a hex dump of >sectors on a disk. If you could look at the directory entry on a floppy >for the file in question, you might be able to see more there than meets >the eye. > >I seriously doubt that these files contain a contageous virus, since these >aren't executable files and I don't think anyone would bother trying to >make a virus for event files that could affect Winquake in such a way as to >cause it to write bogus files. > >Be happy to work more on it later. I'll be in and out for most of the >afternoon. here. > >Karl > > >At 07:57 PM 1/1/2000 +0000, you wrote: >> >>Thanks Karl! >>Just got back home. >>Lets try it and see what the file looks like to you. >>Here's two saves. They look fine everywhere but Winquake 2.4. >>SDR2.7 did the file save. >>Winquake sees ,000101b.ks1 and ,000101a.ks1 and when you try to open >>them it says ",000101b.ks1 was not found. (Of course! because DOS >>WINNT4.0 SP3 or WIN95 SP1 see it as 000101b.ks1. >>I ran NAV on these PC's. But please be sure to check them with your AV >>software! >>I still am wondering about some Y2K virus writing a string to the files and >>Winquake interpretating the file name differently. >>I hate to think of updating motherboards. This WINNT pc is using a 166 and >>it's the fastest PC in the house! There's just got to be a software fix. >>Hoping... >>Thanks Kevin >> >> >>At 09:57 AM 1/1/00 -0800, you wrote: >>> >>>If someone wants to send me a file, I'll be happy to try to read it with >>>Winquake. Send it to me directly, not to the list. >>> >>> >> >>> >>Attachment Converted: "C:\Eudora\Karl's\attach\000101b.ks1" >> >>Attachment Converted: "C:\Eudora\Karl's\attach\000101a.ks1" >> >Attachment Converted: "F:\DOWNLOADS\wqfile.gif" > _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: boom material/size suggestions From: S-T Morrissey sean@........... Date: Sat, 1 Jan 2000 14:57:04 -0600 (CST) Regarding boom material choices: I have experimented with both threaded rod (1/2" aluminum), various tubing, both round and square, and U shaped channels. My experience is that the rod and tubing are difficult to work with, since they are round and/or hollow (=long screws), and the threaded rod really limits the use of fasteners to large nuts and washers, which can be found in aluminum (or brass/stainless, but these may add weight where it is not needed) if your True-Value store has enough of those yellow specialty hardware trays. But aluminum channel is available from most hardware stores, and in a boom dimension of 3/4" wide by 1/2" high and 1/16" wall, provides unlimited fastening opportunities wherever you can drill a hole. As can be seen in the photos of the seismometers on my web site, I use the channel open side up, which provides a place to run the leads to the coils, drop trim/test weights to balance the boom, etc. As can also be seen, I drill rows of holes in all three sides to facilitate experimenting with the design-in-progress as the ideas come together. The hardware stores (Ace, True-value, around here) have a selection of sizes that often nest or fit together closely. A wide channel can be forked at one end to fasten the mass in between, and forked at the mast end to bypass the support mast so the lower hinge can be a short tension wire pulling from the back side (if the mast is narrow enough). Without resorting to specialty suppliers like McMaster-Carr, there is also a good selection of thicker (1/8") aluminum angle that can be drilled and bolted together for the frame. For the base of the large horizontal made up with angles and a flat piece (3" wide x 1/8" thick), I used filled epoxy to glue everything together as well as bolting it (after roughing all the surfaces with 200 grit sandpaper), and it made a very robust frame in liew of buying thick aluminum plate. And since True-Value sells the 1/8" x 3" in 6 foot lengths, you can laminate (with the aluminum-filled epoxy and lots of weight (park on it)), several thicknesses with what you have to buy (or make 4 seismometers!). As for the relative dimensions of a horizontal boom length to support post height, most designs have about a 30-60-90 triangular relation, with about 30 degrees at the mass/tension wire end or 60 degrees at the upper hinge at the top of the mast. Higher hinge supports that make up closer to a 45-45-90 triangle push the clearance height problem of providing a sealed cover for the instrument, and more acute angles increase the stresses on the mass/boom support wire and/or hinges. However, some strictly "garden-gate" designs using crossed flexure or boxed flexure hinges have very shallow heights, like 6" for an 18" boom. Regards, Sean-Thomas _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Comma's From: n0cwr@......... Date: Sat, 01 Jan 2000 21:17:14 +0000 Thinking out loud. If your able to read the files. What is different about your hardware/software? I should be able to read them too. What version and PC are you using? I am using a 486DX50(WIN95)the SDR PC, 486DX120(WIN95) and P166(the WINNT PC that receives the SDR save files over the network). I might mention again that saving the file to disk and then looking at them on any of these PC's and Winquake still see's them with a comma in front of the file name. I tried Winquake v 2.5.2 and 2.4 32 bit versions on the 486DX120. Only Winquake v 2.4 32 bit on the other two. I have a Win95(486DX100), my daughters PC upstairs, and a 386DX40 (WIN3.11) on the network here as well. The 386DX is used for Packetcluster and ham radio databases. This gives me some hope though. My file is useable. Just not by me! :) ha But hasn't make the solution any more obvious at this point. At 12:29 PM 1/1/00 -0800, you wrote: >Kevin -- > >The files attached to your email were 000101a.ks1 and 000101b.ks1. I don't >know if you tried to send the ones that started with a comma, but when they >got here they had no comma in the file name. > >I can open both files just fine with Winquake (v2.6.8). Both appear to be >identical, starting at 11:20:36 on 1/1/00. > >If the filenames you sent started with commas, you might try sending the >files to yourself via email. Maybe that'll strip the commas off. > >Next interesting thing: I renamed the files (using NT4 SP3) and added a >comma to the beginning of both the file names. Winquake still opened the >files without complaint, comma and all. I've attached a .GIF file, which >is a screen dump of Winquake with the ,000101a.ks1 file open. Maybe your >files have more than just a comma at the start. Maybe there are some >hidden characters too. Do you have a program that can do a hex dump of >sectors on a disk. If you could look at the directory entry on a floppy >for the file in question, you might be able to see more there than meets >the eye. > >I seriously doubt that these files contain a contageous virus, since these >aren't executable files and I don't think anyone would bother trying to >make a virus for event files that could affect Winquake in such a way as to >cause it to write bogus files. > >Be happy to work more on it later. I'll be in and out for most of the >afternoon. here. > >Karl > > >At 07:57 PM 1/1/2000 +0000, you wrote: >> >>Thanks Karl! >>Just got back home. >>Lets try it and see what the file looks like to you. >>Here's two saves. They look fine everywhere but Winquake 2.4. >>SDR2.7 did the file save. >>Winquake sees ,000101b.ks1 and ,000101a.ks1 and when you try to open >>them it says ",000101b.ks1 was not found. (Of course! because DOS >>WINNT4.0 SP3 or WIN95 SP1 see it as 000101b.ks1. >>I ran NAV on these PC's. But please be sure to check them with your AV >>software! >>I still am wondering about some Y2K virus writing a string to the files and >>Winquake interpretating the file name differently. >>I hate to think of updating motherboards. This WINNT pc is using a 166 and >>it's the fastest PC in the house! There's just got to be a software fix. >>Hoping... >>Thanks Kevin >> >> >>At 09:57 AM 1/1/00 -0800, you wrote: >>> >>>If someone wants to send me a file, I'll be happy to try to read it with >>>Winquake. Send it to me directly, not to the list. >>> >>> >> >>> >>Attachment Converted: "C:\Eudora\Karl's\attach\000101b.ks1" >> >>Attachment Converted: "C:\Eudora\Karl's\attach\000101a.ks1" >> >Attachment Converted: "F:\DOWNLOADS\wqfile.gif" > _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Amplitude From: "Marchal van Lare" vanlare@.............. Date: Sat, 1 Jan 2000 22:20:42 +0100 Hi all, When I approach my Lehman seismograph, what is the average amplitude I can expect? At this time I see an average amplitude of 3500 on a 16 = bit card. Best regards, Marchal van Lare
Hi all,
 
When I approach my Lehman seismograph, = what is the=20 average amplitude
I can expect? At this time I see an = average=20 amplitude of 3500 on a 16 bit card.
 
Best regards,
 
Marchal van Lare
 
 
Subject: Re: Comma's From: Mauro Mariotti mariottim@...... Date: Sat, 1 Jan 2000 23:07:08 +0100 The problems seems to be a bug of Winquake 16 bit version. I actually trying a demo version of winquake32 and 16. I use a BASIC software that generate text file like PSN record map. If I insert in the text file a date over 12/31/1999 the Winquake insert a comma in head of the filename. The real reason is that the DOS name is NOT changed. The problem is that winquake reorder the filename in his internal memory allocation for variable and the year 2000 is treated by the program in some wrong way that corrupt the filename that winquake use to retrieve the file. So the file cannot be opened. Make this test: 1. Using WQuake32 Open one quake file in PSN binary format of a date before 1/1/2000. 2. Save it as PSN TEXT format. 3. Open it by a text editor and change the date in a 2000 year. 4. Open this new file using Winquake32 and save it as BINARY PSN format. 4. Retry to open this binary file using Winquake16. 5. The file can not be opened! Larry i think meny needs your help... Regards Mauro At 20.54 01/01/2000 +0000, you wrote: >Thanks for checking Karl. >Those were the right files. >In that case! I am totally confused. > >No. The files look fine in everything except when I look at >them with Winquake 2.4 using two different PC's. They appear >when viewed in Winquake. I don't see a thing wrong with >the file name in DOS or WIN OS's. > >So now I'm wondering, what does this mean? >I'm confused and will have to think about this some more. > >I hope you don't mind. >I'm going to cc: this to the list so that other(s) with >trouble might see. May need to get more info from other user just >responded with same trouble. >thanks again. > > >At 12:29 PM 1/1/00 -0800, you wrote: >>Kevin -- >> >>The files attached to your email were 000101a.ks1 and 000101b.ks1. I don't >>know if you tried to send the ones that started with a comma, but when they >>got here they had no comma in the file name. >> >>I can open both files just fine with Winquake (v2.6.8). Both appear to be >>identical, starting at 11:20:36 on 1/1/00. >> >>If the filenames you sent started with commas, you might try sending the >>files to yourself via email. Maybe that'll strip the commas off. >> >>Next interesting thing: I renamed the files (using NT4 SP3) and added a >>comma to the beginning of both the file names. Winquake still opened the >>files without complaint, comma and all. I've attached a .GIF file, which >>is a screen dump of Winquake with the ,000101a.ks1 file open. Maybe your >>files have more than just a comma at the start. Maybe there are some >>hidden characters too. Do you have a program that can do a hex dump of >>sectors on a disk. If you could look at the directory entry on a floppy >>for the file in question, you might be able to see more there than meets >>the eye. >> >>I seriously doubt that these files contain a contageous virus, since these >>aren't executable files and I don't think anyone would bother trying to >>make a virus for event files that could affect Winquake in such a way as to >>cause it to write bogus files. >> >>Be happy to work more on it later. I'll be in and out for most of the >>afternoon. here. >> >>Karl >> >> >>At 07:57 PM 1/1/2000 +0000, you wrote: >>> >>>Thanks Karl! >>>Just got back home. >>>Lets try it and see what the file looks like to you. >>>Here's two saves. They look fine everywhere but Winquake 2.4. >>>SDR2.7 did the file save. >>>Winquake sees ,000101b.ks1 and ,000101a.ks1 and when you try to open >>>them it says ",000101b.ks1 was not found. (Of course! because DOS >>>WINNT4.0 SP3 or WIN95 SP1 see it as 000101b.ks1. >>>I ran NAV on these PC's. But please be sure to check them with your AV >>>software! >>>I still am wondering about some Y2K virus writing a string to the files and >>>Winquake interpretating the file name differently. >>>I hate to think of updating motherboards. This WINNT pc is using a 166 and >>>it's the fastest PC in the house! There's just got to be a software fix. >>>Hoping... >>>Thanks Kevin >>> >>> >>>At 09:57 AM 1/1/00 -0800, you wrote: >>>> >>>>If someone wants to send me a file, I'll be happy to try to read it with >>>>Winquake. Send it to me directly, not to the list. >>>> >>>> >>> >>>> >>>Attachment Converted: "C:\Eudora\Karl's\attach\000101b.ks1" >>> >>>Attachment Converted: "C:\Eudora\Karl's\attach\000101a.ks1" >>> >>Attachment Converted: "F:\DOWNLOADS\wqfile.gif" >> > >_____________________________________________________________________ > >Public Seismic Network Mailing List (PSN-L) > >To leave this list email listserver@.............. with the body of the >message: leave PSN-L > _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: SDR problems From: "Alan and Jocelyn Munro" mjpad@.............. Date: Sun, 2 Jan 2000 11:55:21 +1300 Hi everybody Happy New Year Like others I too have problems. Being in New Zealand we got them first. SDR V 1.8 worked ok on 486 machine. Date changed ok. Can't set BIOS = earlier than 1980. Got small quake 1:36 am 1/1/00. Wouldn't save Got Belleny quake did save but could'nt open file. Had local NZ event 9;12 pm local time saved ok and opened ok Win98 = machine. SDR seemed to be working much better today. Could save easily. Maybe time might help us. Alan Munro Invercargill New Zealand
Hi everybody
Happy New Year
Like others I too have = problems.
Being in New Zealand we got them=20 first.
SDR V 1.8 worked ok on 486 machine. = Date changed=20 ok. Can't set BIOS earlier than 1980.
Got small quake 1:36 am 1/1/00. = Wouldn't=20 save
Got Belleny quake did save but could'nt = open=20 file.
Had local NZ event 9;12 pm local time = saved ok and=20 opened ok Win98 machine.
SDR seemed to be working much better = today. Could=20 save easily.
Maybe time might help us.
 
Alan Munro
Invercargill New = Zealand
Subject: Re: RighTime From: Larry Cochrane cochrane@.............. Date: Sat, 01 Jan 2000 15:09:04 -0800 Jim and others... RighTime should NOT be used with SDR. Since SDR keeps its own time based on the 1 millisecond interrupt from the A/D card running programs like RighTime may cause problems. Like RighTime, SDR compensates for the crystal oscillator being off frequency by either adding or subtracting time. And like RighTime you still need some time reference like WWV, WWVB or GPS... -Larry Cochrane Redwood City, PSN At 09:12 PM 12/31/99 -0500, you wrote: >Is anyone out there running RighTime with either the SDR software package or >with the EMON software? Just curious if RighTime is causing any problems >with the interrupts. > >Thanks.... > >Jim Martin >New Haven, Indiana > _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: RighTime From: "JIM MARTIN" jdmartin@.............. Date: Sat, 1 Jan 2000 18:42:07 -0500 Thanks, Larry. Was just curious if it WOULD indeed cause problems with the interrupts. Thanks again for the info. I will be e-mailing you privately with an order, shortly. Jim Martin ----- Original Message ----- From: Larry Cochrane To: PSN-L Mailing List Sent: Saturday, January 01, 2000 6:09 PM Subject: Re: RighTime > Jim and others... > > RighTime should NOT be used with SDR. Since SDR keeps its own time based on > the 1 millisecond interrupt from the A/D card running programs like > RighTime may cause problems. Like RighTime, SDR compensates for the crystal > oscillator being off frequency by either adding or subtracting time. And > like RighTime you still need some time reference like WWV, WWVB or GPS... > > -Larry Cochrane > Redwood City, PSN > > > At 09:12 PM 12/31/99 -0500, you wrote: > >Is anyone out there running RighTime with either the SDR software package or > >with the EMON software? Just curious if RighTime is causing any problems > >with the interrupts. > > > >Thanks.... > > > >Jim Martin > >New Haven, Indiana > > > > _____________________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email listserver@.............. with the body of the > message: leave PSN-L > _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Comma's From: n0cwr@......... Date: Sat, 01 Jan 2000 23:53:16 +0000 I found a way to open my files. Try this. Right click on the file. Tell it to open. It will bring up the usual list. Winquake isn't there. Click other then bring up Winquake. I told it to use this all the time for .ks1 Why not? Now it will open the files. Why? I've got to think a bit what this means? I still can't open them through Winquake even after modify header and saving , but at least I can access my data. Happy, but.... Things like this drive me crazy! At 12:49 PM 1/1/00 -0700, David wolny wrote: >Kevin > >I too recorded the Quebec event. I can see it in SDR, but Winquake won't >read the file. That darn comma at the front of the file name. I tried >renaming the file but to no avail. I have SDR running in DOS on an old >486. Strange, the computer has the date correctly, 01/01/2000. I guess I >will try Karl's suggestion of renaming the file in the DOS program. > >Dave > > > >_____________________________________________________________________ > >Public Seismic Network Mailing List (PSN-L) > >To leave this list email listserver@.............. with the body of the >message: leave PSN-L > > _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Comma problem From: Larry Cochrane cochrane@.............. Date: Sat, 01 Jan 2000 16:00:19 -0800 All, Unfortunately theres not much I can do about the problem if you are running old software. If you are having any Y2K problems please run the current releases of SDR and WinQuake. The current version of SDR is 2.71 and WinQuake 2.6 is in beta and ready for a full release. I'm holding off making the official 2.6 release for a few more weeks to make sure there aren't any Y2K problems lurking around in the code. I realize this is going to cause some problems with people still running the old Windows 3.1 OS since the new WinQuake release will only run under Win9X, Win NT and Win2k. Given the amount of time I can devote to software design and maintenance, I just don't the time needed to support both 16 and 32 bit versions. If you are running the new versions of my software and see any problems please let me know. I'm running two SDR systems both with Y2K problems when they first boot up. So far I haven't seen any problems, but I haven't reboot the systems yet. I'm pretty sure all I will have to do is set the time at the DOS prompt and restart SDR. I have a Y2K fix it board that I bought awhile back that I will install in one of my system. Since one of the systems acts as a time server, it keeps it's time accurate using WWV, I'm thinking of adding a little more code to SDR so that the year month and day are sent over the serial port so that the other system can set the proper date when it first starts up. Currently only the hour, minute, seconds and milliseconds are sent over the RS-232 serial port. -Larry Cochrane Redwood City, PSN _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: seismic hazard maps From: BOB BARNS roybar@........ Date: Sat, 01 Jan 2000 21:13:50 -0500 Hi gang, Science mag. (24 dec '99, p2423) gives the URL of an interesting site which shows seismic hazard maps among other things. It is seismo.ethz.ch/GSHAP Bill Scolnik and I are also having the comma problem. I am using WinQuake ver. 2.5.2 and SDR ver. 2.71. Bob Barns _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Comma problem From: "JIM MARTIN" jdmartin@.............. Date: Sat, 1 Jan 2000 21:49:50 -0500 Gentlemen, I visited the following site (http://psn.quake.net/cgi-dos/event.exe) and downloaded the 000101a.gr2 file that is listed under the 01/01/00 05:58 UTC listing. I then loaded this file into WinQuake (32-bit version 2.5.2) and lo and behold, it showed up in the list with the predeeding comma !!!! Sure would like to know what's up !! Jim Martin _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Comma problem From: "JIM MARTIN" jdmartin@.............. Date: Sat, 1 Jan 2000 22:06:38 -0500 Gentlemen, I owe you an apology, and Larry as well. I upgraded WinQuake from 2.5.2 to 2.6.8 and the previous post of mine, relating to the preceeding comma problem, is now nonexistent. I reloaded the questionable file into the new version of WinQuake and now everything is just fine. Again, please accept my apologies for an errant post, and Larry, everything on this end is now working just fine. Jim Martin _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Comma's From: n0cwr@......... Date: Sun, 02 Jan 2000 03:38:17 +0000 Since I started this: I'll repeat what most all of you have probably figured out. The latest software works. Older versions may or may not. I've downloaded the latest software and I am sending for the newer registration keys for the SDR PC and the network file receiver. Thanks to Larry for all his efforts in simplifying and making this hobby available to us. It truly is spectacular software... not to mention his making available great hardware! I am sure Brian and I would never had such a great sensor without it. _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: RE: Lehman design questions From: mbrewer mbrewer@...... Date: Sun, 2 Jan 2000 11:42:29 -0400 Jim, I am using threaded rod on my two Lehmans. One is brass the other is stainless steel (stainless steel is non-magnetic). I drilled and tapped home-cast lead weights for both. This makes it easy to position the weights on the boom. I locked the weights in place with stainless steel nuts and washers. I use two weights either side of the magnet so that the balance point of the boom assembly, when suspended vertically by the support wire, is close to the magnet itself. Regards, Martin Brewer, Bermuda -----Original Message----- From: JIM MARTIN [SMTP:jdmartin@............... Sent: Friday, December 31, 1999 5:42 PM To: PSN-L@.............. Subject: Lehman design questions To anyone who wishes to help: Has anyone used a piece of threaded rod for the boom, or is it better to stick with an aluminum dowel, say 1/2" in dia. ? Jim Martin New Haven, Indiana _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: geothermal resource map From: Tobin Fricke tobin@....... Date: Sun, 2 Jan 2000 11:06:10 -0800 (PST) This isn't directly related to seismology, but I thought someone on this list might know: I'm looking for a copy of the "California State Geothermal Resource Map". Anyone have any pointers? Tobin _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: geothermal resource map From: Stephen & Kathy mortskm@....... Date: Sun, 02 Jan 2000 11:33:04 -0800 Tobin Fricke wrote: > > This isn't directly related to seismology, but I thought someone on this > list might know: I'm looking for a copy of the "California State > Geothermal Resource Map". Anyone have any pointers? > > Tobin I would also like to know,,,, I've been searching but haven't found the magic words yet!!! Stephen PSN #55 38.828N 120.978W _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: geothermal resource map From: Stephen & Kathy mortskm@....... Date: Sun, 02 Jan 2000 11:55:13 -0800 Stephen & Kathy wrote: > I would also like to know,,,, I've been searching but haven't > found the magic words yet!!! > > Stephen > PSN #55 > 38.828N 120.978W > Let me clear that up a little,, You can get hardcopy maps from the dept of mines and geology. What I'm looking for are web sites with daily or better yet hourly satellite images dedicated to geothermal activity,, not just IR weather images. Stephen _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: geothermal resource map From: "John Miller" cimarron@.......... Date: Sun, 2 Jan 2000 13:59:13 -0600 Try http://www.oit.osshe.edu/~geoheat/state/ca/ca.htm . http://www.oit.osshe.edu/~geoheat/images/colstate/califor.gif http://www.oit.osshe.edu/~geoheat/califor.htm#alpine This page also has collated resources by county. John Miller Denver, MO Cimarron Co. LLC cimarron@.......... ----- Original Message ----- From: Tobin Fricke To: PSN-L Mailing List Sent: Sunday, January 02, 2000 1:06 PM Subject: geothermal resource map > > This isn't directly related to seismology, but I thought someone on this > list might know: I'm looking for a copy of the "California State > Geothermal Resource Map". Anyone have any pointers? > > Tobin > > > > > _____________________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email listserver@.............. with the body of the > message: leave PSN-L _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: geothermal resource map From: Canie canie@........... Date: Sun, 02 Jan 2000 12:01:44 -0800 You might start here: http://www.consrv.ca.gov/dog/officespersonnel.htm The bottom half of the page lists the offices for geothermal districts in california - they'll know how to get the maps... Canie At 11:06 AM 1/2/00 -0800, you wrote: >This isn't directly related to seismology, but I thought someone on this >list might know: I'm looking for a copy of the "California State >Geothermal Resource Map". Anyone have any pointers? > >Tobin > > > > >_____________________________________________________________________ > >Public Seismic Network Mailing List (PSN-L) > >To leave this list email listserver@.............. with the body of the >message: leave PSN-L _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: USA Map From: Seisguy@....... Date: Sun, 2 Jan 2000 20:04:09 EST Check out the USA Current EQ Map, it's gone goofy, shows lots of Midwest activity! Mike http://cires.colorado.edu/people/jones.craig/EQimagemap/us.html _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Lehman tilt sensitivity From: S-T Morrissey sean@........... Date: Sun, 2 Jan 2000 20:00:25 -0600 (CST) Marchal, Regarding estimating the sensitivity of a horizontal seismometer: The question you ask is somewhat ambiguous since many unknowns are involved. It is very hard to guess what a seis will do as you walk up to it, the main variable being the strength of the local support: floor, pier, isolated pier, rock outcrop, etc. And the orientation of the sensor with respect to the supporting medium and the induced disturbance is very important. For example, if the horizontal seis is located on a concrete flooring slab near a basement wall or foundation, the wall/foundation will provide more support than the open area and act as a hinge to the resulting tilting. So if the boom of the horizontal seis is parallel to the wall, the offset will be much more than if the boom is at a right angle to the wall or foundation. Tilting a horizontal seis along the axis of the boom only changes the mechanical period, while tilting across the boom axis can cause large displacements of the mass depending on the boom length and the operating period. Of course, since a horizontal seis is generally longer than it is wide, it is tempting to set up the seis with the boom axis parallel to the wall rather than sticking out into the room. And, also of course, all this depends on where you park your car. I showed and explained the applicable equations a few days ago. The most important point is that the tilt sensitivity is a function of the square of the period, like a 20-second seis is 4 times as sensitive as a 10-second sensor. The formulas also showed how the displacement sensitivity of eith a horizontal or vertical can be calibrated by tilting the base. A general method of estimating the sensitivity of any long-period seismometer (as is the Lehman design) is to look for the background 6-second microseisms. While these vary in amplitude by x 10 to x 100 depending on the seasons, locations in the world, hurricanes, typhoons, and storms in the North Sea, they are always present. The period ranges form 3 to 12 seconds, 6 being dominant, so a 10-second seis will be particularly sensitive if it under damped. (The flat velocity response of a VBB broadband system makes them obvious, but a 1-second seis will only show them at high (100k) magnifications. Today at St. Louis the microseisms started out at about 2 microns, but have decreased to about 0.4 microns as the storm causing them moved away from the New England coast. With my sensitivity of 5.29 mv/u/sec (millivolts/micron/second), 5 mv is about 1 u/sec, which is about 1 micron at 6 seconds (since omega = 2*pi/T = 1 if T = 2*pi). With my simple 12-bit digitizer, 5 mv is 50 counts out of 2048, or about 2.5%. If I had a 16-bit digitizer, I would want the microseisms to be about 5%, or 1600 counts, which would provide nanometer resolution at 1 second. You mention that your system shows 3500 counts of tilt as you walk up to it. A 16-bit system maximum is about 32000 counts, so your tilt noise is about 9%. Unless you have a very competent site, I would expect a much larger tilt. I would look for the microseisms to be at least 1000 counts. Maybe someone who is operating the Lehman design can let us know what their microseism levels are, or even what their experience is with induced tilting. Regards, Sean-Thomas _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Comma's From: "David A. Nelson" davenn@........ Date: Tue, 4 Jan 2000 00:18:07 +1300 unfortunately we have a bunch of SDR's in NZ that wont run the later versions of SDR we are using ver1.8 which is the latest version that can be run anothe fix for this comma problem would be appreciated as we cant get our files into winquake Co-ordinator: New Zealand Public Seismic Network Dave A. Nelson ZL4TBN 23 Duncan St., Dunedin, South Is.. New Zealand. http://www.seismicnet.com/dave/home.htm IF there indeed are other parallel universes... I can now rest in the knowledge, that in at least one of them, I am filthy rich and drive a red Ferrari _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Comma's From: BOB BARNS roybar@........ Date: Mon, 03 Jan 2000 09:51:41 -0500 Hi, The comma problem looks to be a problem with WinQuake, not SDR. When I downloaded and installed WQ2.6.8, the problem went away. Bob Barns "David A. Nelson" wrote: > > unfortunately we have a bunch of SDR's in NZ that wont run the later > versions of SDR > we are using ver1.8 which is the latest version that can be run > > anothe fix for this comma problem would be appreciated as we cant get > our files into winquake > Co-ordinator: > New Zealand > Public Seismic Network > Dave A. Nelson ZL4TBN > 23 Duncan St., > Dunedin, > South Is.. New Zealand. > > http://www.seismicnet.com/dave/home.htm > > IF there indeed are other parallel universes... I can now rest in the > knowledge, that in at least one of them, I am filthy rich and drive a red > Ferrari > > _____________________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email listserver@.............. with the body of the > message: leave PSN-L _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Comma's From: meredith lamb mlamb1@.......... Date: Mon, 03 Jan 2000 10:14:16 -0800 "David A. Nelson" wrote: > unfortunately we have a bunch of SDR's in NZ that wont run the later > versions of SDR > we are using ver1.8 which is the latest version that can be run > > anothe fix for this comma problem would be appreciated as we cant get > our files into winquake > Co-ordinator: > New Zealand > Public Seismic Network > Dave A. Nelson ZL4TBN > 23 Duncan St., > Dunedin, > South Is.. New Zealand. > Hi Dave, I'd still try one gambit with older SDR recording computers, and that is too just use a year date the computer can work with. Then change the event file date later on your Winquake file reading computer. I'd strongly suggest reformatting the old drive and entering in a year date as old as the computer itself, and, a year date MONTH that matchs 2000 itself. If you need to change year date thereafter, one must use a year date beyond the bios I think (or it will likely crash). 1976 I think matches the year 2000 for each month. If the computer doesn't accept that, one will have to consult the Windows "date/time" calender for a month that matches 2000. Currently Windows 95 system shows the years 1983 and 1994 as only matching the month of January 2000. Of course another method is too do the above, leave the system running as is, and take careful note of the files date as related too the real date...then change the files data date. Very inconvenient approach....but it might work until other reparations arrive, or, newer systems can be obtained. Yes, this is nothing new......but I don't see any other approach magically fixing old systems otherwise. I don't think anyone or a program will arrive concerning older systems in this regard normally. Meredith Lamb _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: From: "Finke, John E." Finke@........... Date: Mon, 3 Jan 2000 12:25:26 -0500 I am looking for a copy of the following publication, which I understand to be out of print, and thought that perhaps someone within this group might have some information or even an extra copy they are willing to part with. Incidentally, I have been to all the major online book wholesalers and retailers even some minor ones. Also I tried the actual publisher all to no avail. The publication is "The Assessment and Mitigation of Earthquake Risk" Published by UNESCO (United Nations Educational, Scientific, and Cultural Organization). The ISBN is 92-3-101451-X. Thanks, John Finke, P.E., S.E. finke@........... _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Seismographs for students From: Ruediger Wisskirchen rwisskirchen@....... Date: Sun, 02 Jan 2000 23:43:34 +0200 barry lotz wrote: > Ruediger > It may work as a strong motion sensor. I agree with Ted, usually you want > the natural period of the sensor to be longer than the lowest period you want > to record. Also since the output would be a function of the # of wire coils > turns you may have a very low output signal . Speakers usually have few turns. But is it possible, that the strong magnet more than compensats this disadvantage? A simple test with a big loudspeaker, a simple amplifier with a 741 and amp.factor 100 gives a strong signal, when I just make a bit wind with my hand against the membran. > > What you describe maybe the begining of a force balance sensor but you would > need a displacement sensor included which would complicate matters. I have read the article about the force-balance-seismometer, but due to my oor english I haven`t quite understood the difference between the forcebalance and the lehman-sensor. Why do you need a displacement sensor? > Do you have > access to magnet wire and simple rectangular magnets? You could use an electric > drill and wind your own coil of 1000+ turns on say a old spool like an empty > solder spool. Is it better for a high voltage to have a short coil with much layers or does a long coil with the same number of wires produeces the same effect? > You could then put a rectangular magnet on both sides of the > coil. As Ted says you probable will have more interesting events if you do not > attach the groung to the end of the boom except as I have described above. I > hope this helps a little. Most of us look around to find possible sensor > parts from devices use for other things, for example computer harddrive driver > as sensor/coil pairs. I still have some old harddisks, thanks for that hint. > > Barry > > ted@.......... wrote: > Thanks Ruediger Wisskirchen (rwisskirchen@........ _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: SDR and Replay Mode From: meredith lamb mlamb1@.......... Date: Tue, 04 Jan 2000 09:58:24 -0800 Hi all, Am running SDR V2.71 and trying to use the replay mode and consistently getting the "not found" screen notice. Actually, I've had older versions and unfortunately have never been successful. Otherwise the program itself runs fine. Checking under the windows 95 system, the program shows the SDR program contents as: (file)0001(year/month) chan1.002 chan1.003 chan1.004 chan1 etc........showing other channels The replay mode screen shows: File C:\SDR\Chan1.001 not found. - Press Any Key NOW......under SDR is a listed year date subfile: 0001 With nothing in it. Maybe this is where the data should be, but its empty. Any resolutions or suggestions? Thanks, Meredith Lamb _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Comma's From: "Randall Pratt" randallpratts@.............. Date: Tue, 4 Jan 2000 09:30:43 -0800 I have changed the format for file naming in EMON to move the year to a later portion of the name and I get the same result. For example file P0300AN.rlp has a comma also. By using the windows option to open file type ..rlp the file will open but the date of the file start is shown as 1/03/100. It appears that a fix might be to read the file into a structure and change the year field or at least find out what is being saved as a year in the header of the event file. Randy _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: A "wonder magnet" really is... From: meredith lamb mlamb1@.......... Date: Tue, 04 Jan 2000 15:08:13 -0800 Hi all, Looking at Wondermagnets products I see item #16 as a mystery magnet....I can't envision what it was ever used for? http://www.wondermagnet.com/dev/magnet16.html I've seen these before and they are basically two thick sheets of ferrite glued together and (sometimes) painted. Essentially they are 2 magnets together or using another phrase they are a 4 pole magnet. Although somewhat "U" shaped, with a semi-circular cut-out, the conflicting fields present problems with uses like seismic instruments.......they are way too big to handle anyway. The center cutout offers no outstanding field as is. Nothing is known of any accessory soft iron core material exactly. Robert Lamb says he's seen them with a backing plate, and, with a plate that covers roughly the circumference of the hole with two magnets. They almost look like they were originally designed to go part way around a pipe (roughly 3.7" diameter). Some kind of plumbing use? Some kind of early day accelerator use? Dinosaur (cow) pill from swallowing magnetic metorites? OK.....OK....I get carried away....ha. Carry on with your computer glitches.... Meredith Lamb _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: A "wonder magnet" really is... From: "Dewayne Hill (n0ssy)" n0ssy@.......... Date: Wed, 05 Jan 2000 00:01:09 +0000 These magnets are out of an IBM 3360(?) disk drive. I have three of them and the are VVVVVVVVVVVVVVVery strong. The poles are across (side to side) and not end to end. You don't want to get your fingers between two of them... Dewayne Hill >Hi all, > >Looking at Wondermagnets products I see item #16 as a >mystery magnet....I can't envision what it was ever used for? > >http://www.wondermagnet.com/dev/magnet16.html > >I've seen these before and they are basically two thick sheets >of ferrite glued together and (sometimes) painted. Essentially >they are 2 magnets together or using another phrase they are a >4 pole magnet. Although somewhat "U" shaped, with a >semi-circular cut-out, the conflicting fields present problems >with uses like seismic instruments.......they are way too big to >handle anyway. The center cutout offers no outstanding field >as is. Nothing is known of any accessory soft iron core >material exactly. Robert Lamb says he's seen them with a >backing plate, and, with a plate that covers roughly the >circumference of the hole with two magnets. > >They almost look like they were originally designed to go >part way around a pipe (roughly 3.7" diameter). Some kind of >plumbing use? Some kind of early day accelerator use? >Dinosaur (cow) pill from swallowing magnetic metorites? >OK.....OK....I get carried away....ha. > >Carry on with your computer glitches.... > >Meredith Lamb > > >_____________________________________________________________________ > >Public Seismic Network Mailing List (PSN-L) > >To leave this list email listserver@.............. with the body of the >message: leave PSN-L > > Dewayne Hill (n0ssy) Westminster, Colorado USA 39.83569n 105.0627w Elev. 5660ft. _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: A "wonder magnet" really is... From: meredith lamb mlamb1@.......... Date: Tue, 04 Jan 2000 20:38:31 -0800 "Dewayne Hill (n0ssy)" wrote: > These magnets are out of an IBM 3360(?) disk drive. I have > three of them and the are VVVVVVVVVVVVVVVery strong. The > poles are across (side to side) and not end to end. > You don't want to get your fingers between two of them... > > Dewayne Hill > Hi Dewayne, I'am kind of amazed at this answer. Maybe I shouldn't be, perhaps they are like 60's or 70's vintage age? I've messed with them before somewhat, and although their gauss isn't terrific, their mass bulk (about 4 lbs) certainly contributes a great deal of hazard/finger wise. Thanks for a answer...it's one of those things I've wondered about for some time. Meredith Lamb _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Fwd: Earth Science Student- Looking for A Siesmic Station From: Bill Scolnik wls@......... Date: Tue, 04 Jan 2000 23:28:55 -0500 I received this today and I'm afraid I can't help him. Can anyone here help him with some photographs, etc? >From: BlueRoxy26@....... >Date: Tue, 4 Jan 2000 18:39:59 EST >Subject: Earth Science Student- Looking for A Siesmic Station >To: wls@......... >X-Mailer: AOL 4.0 for Windows 95 sub 26 > >Dear Mr. Scolnic, > > Hello, wy name is Whitney and I am a ninth grade, Earth Science >Student at a Catholic High School. I am doing a Science Fair Project for my >2nd semester project, it has to do with seismographs. My teacher, Bro. Nigel >Pratt, said that I should visit a seismic station. When I looked seismic >stations on-line the closest one I found was this one in Oakland, NJ. If you >could send me some information on this seismic station, and many pictures of >it, I would be very greatful! Thank you for your time. > >P.S.- The project is due on January 14, so the sooner you respond the happier >I'll be thank you so much! _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Fwd: Earth Science Student- Looking for A Siesmic Station From: "Robert W. Avakian" ravakian@............ Date: Tue, 04 Jan 2000 23:39:27 -0600 But where is he located? His best bet for a real time visit is a college or University, but without knowing where he is located, that's hard to recommend. Bob Avakian ?Bill Scolnik wrote: > > I received this today and I'm afraid I can't help him. Can anyone here help > him with some > photographs, etc? > > >From: BlueRoxy26@....... > >Date: Tue, 4 Jan 2000 18:39:59 EST > >Subject: Earth Science Student- Looking for A Siesmic Station > >To: wls@......... > >X-Mailer: AOL 4.0 for Windows 95 sub 26 > > > >Dear Mr. Scolnic, > > > > Hello, wy name is Whitney and I am a ninth grade, Earth Science > >Student at a Catholic High School. I am doing a Science Fair Project for my > >2nd semester project, it has to do with seismographs. My teacher, Bro. Nigel > >Pratt, said that I should visit a seismic station. When I looked seismic > >stations on-line the closest one I found was this one in Oakland, NJ. If you > >could send me some information on this seismic station, and many pictures of > >it, I would be very greatful! Thank you for your time. > > > >P.S.- The project is due on January 14, so the sooner you respond the happier > >I'll be thank you so much! > > _____________________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email listserver@.............. with the body of the > message: leave PSN-L _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Fwd: Earth Science Student- Looking for A Siesmic Station From: BOB BARNS roybar@........ Date: Wed, 05 Jan 2000 10:30:00 -0500 Hi, I will reply to this directly to BlueRoxy26@....... and suggest that he come see my rig in Berkeley Heights. There are some pictures of my seis and another one on my web site at members.home.com/roybar Bob Barns Bill Scolnik wrote: > > I received this today and I'm afraid I can't help him. Can anyone here help > him with some > photographs, etc? > > >From: BlueRoxy26@....... > >Date: Tue, 4 Jan 2000 18:39:59 EST > >Subject: Earth Science Student- Looking for A Siesmic Station > >To: wls@......... > >X-Mailer: AOL 4.0 for Windows 95 sub 26 > > > >Dear Mr. Scolnic, > > > > Hello, wy name is Whitney and I am a ninth grade, Earth Science > >Student at a Catholic High School. I am doing a Science Fair Project for my > >2nd semester project, it has to do with seismographs. My teacher, Bro. Nigel > >Pratt, said that I should visit a seismic station. When I looked seismic > >stations on-line the closest one I found was this one in Oakland, NJ. If you > >could send me some information on this seismic station, and many pictures of > >it, I would be very greatful! Thank you for your time. > > > >P.S.- The project is due on January 14, so the sooner you respond the happier > >I'll be thank you so much! > > _____________________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email listserver@.............. with the body of the > message: leave PSN-L _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: computer power supply From: cparker@............... (Christian Parker) Date: Wed, 5 Jan 2000 08:56:03 -0700 (MST) Has anyone here ever tried to use the power supply from an old PC to power their seismometer electronics? I have one laying around so I was going to give this a try. The power supply outputs +12vdc and -12vdc from one of the connectors that normally connects to the motherboard. The pinouts of this connector are as follows: Pin Name Color Description 1 PG Orange Power Good, +5 VDC when all voltages has stabilized. 2 +5V Red +5 VDC (or n/c) 3 +12V Yellow +12 VDC 4 -12V Blue -12 VDC 5 GND Black Ground 6 GND Black Ground I'm wondering if this power is suitable for powering op amps? Christian Parker Boulder, CO cparker@............... _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: computer power supply From: "Raul J. Alvarez" ralvarez@........ Date: Wed, 05 Jan 2000 09:28:30 -0700 Christain, I suspect that you would have a lot of problems with hash (electrical noise) from this supply. This type of supply is a switcher. You probably be better off getting a +- 12 or 15 volt transformer type supply. Raul Alvarez Bellvue, CO Christian Parker wrote: > Has anyone here ever tried to use the power supply from an old PC to power > their seismometer electronics? I have one laying around so I was going to > give this a try. The power supply outputs +12vdc and -12vdc from one of the > connectors that normally connects to the motherboard. The pinouts of this > connector are as follows: > > Pin Name Color Description > 1 PG Orange Power Good, +5 VDC when all voltages has stabilized. > 2 +5V Red +5 VDC (or n/c) > 3 +12V Yellow +12 VDC > 4 -12V Blue -12 VDC > 5 GND Black Ground > 6 GND Black Ground > > I'm wondering if this power is suitable for powering op amps? > > Christian Parker > Boulder, CO > cparker@............... > > _____________________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email listserver@.............. with the body of the > message: leave PSN-L _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: To see a seismograph in New Jersey From: CapAAVSO@....... Date: Wed, 5 Jan 2000 12:10:22 EST Whitney can see an excellent amateur-built seismograph at the Nature Center in Rifle Camp County Park in West Paterson, NJ. Call 201 523 0024 to check visiting hours. Just across the NJ boarder in Palisades, NY is Columbia University's Geological Observatory which is the Eastern Networks seismic center with many professional seismographs. There is only one visiting day a week but I'm sure they would be happy to show Whitney their seismographs for his science fair project. Cap _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: computer power supply From: "Charles R. Patton" crpatton@...... Date: Wed, 05 Jan 2000 10:11:08 -0800 Christian, In addition to Raul J. Alvarez=92s quite accurate comment to be concerned= about hash from the supply due to the switcher topology used, two other important points come to mind: 1) Many of those PC type P/S require a minimum load. Without that minimum load, regulation and in some cases, the P/S itself fails catastrophically. A typical technique we often used when trying to do certain types of tests on the P/S itself was to load the 5V to about 2A or more or the 12V to 1A with a fixed resistor. 2) Cross regulation is often less than satisfactory. I.e., the +12 V and +5 V are sometimes regulated by the ratio of the windings in the transformer and only the +5 V is actually feedback to the switcher control circuits, so consequently the +12 V is subject to greater variation since the voltage drops in the P/S circuit under changing load are not compensated for. Anecdotal notes about P/S hash. 1) Solving EMI (ElectroMagnetic Interference problems, i.e., hash) was one of the main aspects of my job at a disk drive manufacturing company. There were multiple incidents where a poorly designed switcher was putting out incredibly difficult to remove hash on the supply=92s output lines that found its way into the disk drive effecting the read performance. One way of looking at it is that a disk drive consists of a magnetic field sensor (a read head) generating tens of microvolts of signal in the 10 MHz to-50 MHz region inside a shielded enclosure. If this can be effected, then so can a seismometer. 2) I just finished putting together a new PC with all new parts. My wife was not happy with the fact that whenever it was on she could not receive a certain AM station. The cure turned out to be that I had to add a Corcom line filter on the AC power cord entering the computer, which completely cured my problem. The point, though, was that the tower case I bought was cheap (the only correct word for a $69 tower case with P/S) and so did not have adequate line filtering on the AC line side, and this is a brand new, ATX level P/S. So hash problems are not confined to old designs or just the load side. _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: computer power supply From: meredith lamb mlamb1@.......... Date: Wed, 05 Jan 2000 11:19:27 -0800 Christian Parker wrote: > Has anyone here ever tried to use the power supply from an old PC to power > their seismometer electronics? I have one laying around so I was going to > give this a try. The power supply outputs +12vdc and -12vdc from one of the > connectors that normally connects to the motherboard. The pinouts of this > connector are as follows: > > Pin Name Color Description > 1 PG Orange Power Good, +5 VDC when all voltages has stabilized. > 2 +5V Red +5 VDC (or n/c) > 3 +12V Yellow +12 VDC > 4 -12V Blue -12 VDC > 5 GND Black Ground > 6 GND Black Ground > > I'm wondering if this power is suitable for powering op amps? > > Christian Parker > Boulder, CO > cparker@............... > > Christian, I'am sure I'am stepping into this subject where I don't belong, but from my recollection from my brother, he has used these very supplys for various electronic experiments. Without further details, I would think that they might need additional power supply filters (capacitors) on the output. Usually one of the switching supply voltages is very limited on current capacity; so, one would have to watch that. Also "if" I recollect right.....(ahem), he stated that they are better than the regular power supplys for transient protection (spikes). J.B. Saunders surplus there in Boulder also has a wide variety of various types of power supplys there in Boulder; which might work. Of course the normal dual voltage supplys are somewhat rare compared to the switching supplys in quanity. One might consider buying 2 regular transformer DC supplys to join together to make the dual supply. Radio Shack also has these cheap single supplys available. The one remaining subject of power supplys is their regulation performance. Perhaps for amateur projects this can be fairly passed over, as the normal use involved doesn't normally cause problems where the sensor/s is coil/magnet and ampifier. I actually used one switching supply on my Hall seismometers for awhile, till it went kapoot. (I still saw transient spikes.... mainly from the house furnace motor...ha) Without knowing specifically what you are trying to do, its hard to recommend something. If you intend to lean toward a coil and magnet affair; I would suggest buying from Larry. His stuff works fine. The trouble with home brew is that one can usually end up spending more than buying commercially; and, end up with something less than the quality they would get if they had only just bought the stuff to begin with. Yes....electronics and computers drive me bugs....ha. Take care, Meredith Lamb _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: computer power supply From: ted@.......... Date: Wed, 5 Jan 2000 14:00:08 -0500 Meredith, You're not the only one that gets driven buggy by electronics and computers. My first Lehman amplifier would not work right for a year, but when I would send it to friends who knew what they were doing it would work fine. It finally dawned on me that it takes more than 2 6-volt lantern batteries in series to get +/- 12V. Like maybe 4? Duh... Regards, Ted _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: output of speaker coil From: S-T Morrissey sean@........... Date: Wed, 5 Jan 2000 13:36:46 -0600 (CST) Ruediger, Re the output of a large speaker for potential use as a seismometer: Your experiment with the 100x amplifier and speaker does show that the moving coil can generate a voltage with indescernable motions, like fanning air against the speaker. This, however, is a very large signal when compared with seismic ground motions. In fact, even miniscule thermal convection WITHIN the case of a seismometer can be a large signal, and we have resorted to small (10 watt) heaters in the topmost part of large seismometer cases to try to stratify (hotter at the top) the air within the case. We also put insulation between the pier and the bottom of the case, since earth heat transmitted through the pier would cause a thermal inversion within the case. Some modern and pricy VBB sensors are installed in a vacuum bell. Here are some numbers that may help clarify the sensitivity question. I have measured the coil constant of several large speakers, and the constants run from 10 to 20 Volts/meter/second. By comparison, small high-frequency geophones run about 40 V/M/s, larger 1 hz and up seismometers run 200 to 500, and fedback (electronic) seismometers have an output of 1000 V/m/s and up. In our normal use of a 1 hz seismometer with 270 V/m/s (the L-4C with a 5500 ohm coil), remote station sites have required amplifier gains of 60 to 78 db (x 1000 to x 8000) for optimal sensitivity to both near-field and distant earthquakes. We use a damping/attenuation network that provides 100V/m/sec into the amplifier, which after the gain of 4000, gives 0.4 volt/micron/second. With an electronic noise level of around 1 millivolt, our resolution is about 2.5 nanometers/second, and our maximum signal is 4 volts = 10 microns/second. (I have such a "short period" telemetered station in the back field of the farm here). The station is sensitive to any Mb 3.0 event within several hundred kilometers, and most 1-second p-waves from teleseisms. So to use a speaker with 10 V/m/sec, an amplifier gain of about 10 times what we use for the L4-C would be needed, or something like 8000 to 80,000. This could result in a fairly noisy amplifier since several stages would be required (we use two stages for the 78db amplifier; the schematic of which is posted). But this is workable with proper filtering. But a low output from the coil/magnet is not the main problem with a speaker. The compliance of the speaker suspension is rather stiff for seismometer use. I chopped a speaker cone and the back webbing into spider strips to still support the coil, but was unable to sense the earth microseism background of about 1 micron at 6-seconds. Since I had glued on about 10 each 1/4" lead shot balls as a mass, eventually the speaker suspension sagged and the coil dragged. I think that carefully winding a coil (ie forget the drill) for a maximum number of turns within the magnet gap, but enough length either side to have a linear output, will produce the best signal. The output increases with the square root of the coil resistance if all the other dimensions are the same (ie more turns means smaller wire in the same volume so the resistance increases; see the Riedesel paper). But given unlimited space, it is a function of the number of turns within the magnet gap. Various trade-offs seem to favor using wire about #36 size to achieve coils of a few thousand turns and several hundred ohms for strong magnets. Regards, Sean-Thomas _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Antique Seismographs From: Larry Cochrane cochrane@.............. Date: Wed, 05 Jan 2000 14:42:44 -0800 Anyone know what this is? Please CC the sender since they are not on the list. Thanks, -Larry >Date: Wed, 05 Jan 2000 17:34:51 -0800 >From: Paul Hayton >Organization: interlog.com >X-Mailer: Mozilla 4.08 [en] (Win95; I) >To: cochrane@.............. >Subject: Antique Seismographs > >Hi there.. enjoyed looking through your site today. > >I have a mystery instrument, that I am guessing has something to do with >seismology... if you could have a look and give me your opinion, much >appreciated. > >http://www.concept.ca/mystery1.jpg > >Thanx again > >Cassie >>^..^<< > > _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Antique Seismographs From: "steve hammond" shammon1@............. Date: Thu, 6 Jan 2000 00:09:36 -0800 Is there magnets or a compass inside it? Is that an eye cup in the top? What is in the lower window? a mirror? Please reply to the PSN-L@.............. Regards, Steve Hammond PSN San Jose/Aptos California -----Original Message----- From: Larry Cochrane To: PSN-L@.............. Date: Wednesday, January 05, 2000 2:43 PM Subject: Antique Seismographs >Anyone know what this is? Please CC the sender since they are not on the list. > >Thanks, > >-Larry > >>Date: Wed, 05 Jan 2000 17:34:51 -0800 >>From: Paul Hayton >>Organization: interlog.com >>X-Mailer: Mozilla 4.08 [en] (Win95; I) >>To: cochrane@.............. >>Subject: Antique Seismographs >> >>Hi there.. enjoyed looking through your site today. >> >>I have a mystery instrument, that I am guessing has something to do with >>seismology... if you could have a look and give me your opinion, much >>appreciated. >> >>http://www.concept.ca/mystery1.jpg >> >>Thanx again >> >>Cassie >>^..^<< >> >> > >_____________________________________________________________________ > >Public Seismic Network Mailing List (PSN-L) > >To leave this list email listserver@.............. with the body of the >message: leave PSN-L _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Fwd: Mystery1.jpg From: DGentry509@....... Date: Thu, 6 Jan 2000 15:51:24 EST Additional info on the subject item. Very interesting. Hope someone can figure this out. DRG Hi there... Thank you for your email.... here is my layman's (woman's) description of this mystery object. Made of brass, the main tube is 7 inches long, it has three legs that unfold from the base, independent of each other. (I believe so it can be made level on any surface.) There is a smaller brass tube suspended inside the main tube. There are cross hairs at the top, a rather thick metal cross with a conical type center that is about a 1/2inch in depth. The glass viewing lens at the top is gimbaled. I do not believe this to be a microscope as the magnification is very slight. When looking in, you see the bottom of the inner brass tube. It is silvered with etched concentric circles. You can also see 4, equally spaced screws jutting inwards from the tube about half way down. There is a slide lever on the outer tube (near the bottom) to raise and lower the inner tube, however it is stiff. It is much easier to twist the outer brass tube and the lever slides accordingly. There is also an inner glass tube which forms the windows, this glass tube slides up, I assume to allow access to the inside. There are holes in the brass tube which appear to allow for the glass to be held up in place if needed simply by inserting something to hold it in place. When I have it sitting on a still surface and I shake the surface slightly, the inner tube sways in a pendulum motion. It is very sensitive, as I type on my keyboard I can see the inner brass tube swaying in a circular motion. The lable on the inside of the box reads as follows (and I'm guessing as the handwriting is not clear) Presented to A.S.E Ackerman Esquire (it could be Dr. S.E) by Horatio Nelsin Crelliun June 1910 The lable on the outside of the box reads H. England The wooden box has a hinged lid, the hinges read P Moore Patent #2 Thanking you in advance for your time and energy in looking at this mysterious item. Look forward to hearing from you soon. Cassie >>^..^<< ==== DGentry509@....... wrote: > Paul, am trying to figure out what this unit is. > > Do you have it? The paper looks like it says Dr. S.E. ............Esquire > and the date June 1910 > > Looks to me like a microscope of some sort and uses the 90 degree slanted > slot for focus (depth adjustment) just like my router. > > I'm not able to get to anywhere past your initial web page index. > > Do you have dimensions? > > Was directed to your page by a group of amateur seismologists. > > Thanks, Don Gentry Subject: Re: Mystery1.jpg From: ChrisAtUpw@....... Date: Thu, 6 Jan 2000 17:20:14 EST Cassie, If you could put a clear photo of the label on your site, it might help. I think that the letter before S.E. is probably Lt (Lieutenant) indicating either a military or naval origin ?Level meter ?Surveying. Is there anything to indicate that the instrument is not complete, or that formerly mirrored surfaces have corroded? Have you asked any of the Science Museums if they can recognise it? _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: computer power supply From: barry lotz gbl@....... Date: Thu, 06 Jan 1983 03:05:59 -0800 What I'd like to find is an inexpensive dual output "wall wart" rather than a single output one and have to split the output with an opamp. Barry _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: SDR and Replay Mode From: barry lotz gbl@....... Date: Thu, 06 Jan 1983 05:30:02 -0800 Meredith, Larry I think I have a similar situation. With the Santa Cruz 6.0 event , the event spanned over a two day local (Pacific) time. When I replayed or tried to save the event with a display window that spanned the full event time, it stopped at the end of the first days record and I couldn't save the file. If I set the replay display window to a short time( ie stop before the end of the first day ) but saved a 60-70 sec window, it save the file fine. It may be in the display routine and not the save section. Barry meredith lamb wrote: > Hi all, > > Am running SDR V2.71 and trying to use the replay mode and > consistently getting the "not found" screen notice. Actually, I've > had older versions and unfortunately have never been successful. > Otherwise the program itself runs fine. > > Checking under the windows 95 system, the program shows > the SDR program contents as: > > (file)0001(year/month) > chan1.002 > chan1.003 > chan1.004 > chan1 > etc........showing other channels > > The replay mode screen shows: > > File C:\SDR\Chan1.001 not found. - Press Any Key > > NOW......under SDR is a listed year date subfile: > > 0001 > > With nothing in it. Maybe this is where the data should be, > but its empty. > > Any resolutions or suggestions? > > Thanks, Meredith Lamb > _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: [Fwd: Re: Antique Seismographs] From: Steve Hammond Shammon1@............. Date: Thu, 06 Jan 2000 20:01:32 -0800 Hi there, thanx for the email.... okay the mystery item is as follows... Made of brass, the main tube is 8inches long, it has three legs that unfold and are independent of each other, I believe so it can be made level on any surface. There is another brass tube suspended inside the main tube. There are cross hairs at the top, a rather thick metal cross with a conical type center. the glass lens at the top is gimbaled. The base of the inner suspended brass tube i silvered with etched concentric circles. There is a slide lever on the outer tube to raise and lower the inner tube. When I have it sitting on a still surface and I shake the surface slightly, the inner tube sways like pendulum and you can see how far it has moved by the rings at the bottom. The little window of curved glass slides up to give access to the area inside. I really have no idea what this thing is! The lable on the inside of the box reads as follows (and I'm guessing as the handwriting is not so clear) Presented to A.S.E Ackerman Esquire by Horatio Nelson Crelliun June 1910 The lable on the outside of the box reads H. England Thanx for any help you can give, Cassie >>^..^<< steve hammond wrote: > Is there magnets or a compass inside it? Is that an eye cup in the top? What > is in the lower window? a mirror? > Please reply to the PSN-L@.............. > Regards, Steve Hammond PSN San Jose/Aptos California > > -----Original Message----- > From: Larry Cochrane > To: PSN-L@.............. > Date: Wednesday, January 05, 2000 2:43 PM > Subject: Antique Seismographs > > >Anyone know what this is? Please CC the sender since they are not on the > list. > > > >Thanks, > > > >-Larry > > > >>Date: Wed, 05 Jan 2000 17:34:51 -0800 > >>From: Paul Hayton > >>Organization: interlog.com > >>X-Mailer: Mozilla 4.08 [en] (Win95; I) > >>To: cochrane@.............. > >>Subject: Antique Seismographs > >> > >>Hi there.. enjoyed looking through your site today. > >> > >>I have a mystery instrument, that I am guessing has something to do with > >>seismology... if you could have a look and give me your opinion, much > >>appreciated. > >> > >>http://www.concept.ca/mystery1.jpg > >> > >>Thanx again > >> > >>Cassie >>^..^<< > >> > >> > > > >_____________________________________________________________________ > > > >Public Seismic Network Mailing List (PSN-L) > > > >To leave this list email listserver@.............. with the body of the > >message: leave PSN-L _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: [Fwd: Re: Antique Seismographs] From: "steve hammond" shammon1@............. Date: Thu, 6 Jan 2000 21:32:41 -0800 -----Original Message----- From: Steve Hammond To: psn-l@.............. Date: Thursday, January 06, 2000 9:02 PM Subject: [Fwd: Re: Antique Seismographs] Paul, is the bottom a plate or is there a hook or loop at the bottom of the inner tube. Also, looking in the window, I can see metal. is it attached to the tube and could it have been or is it magnetic? _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: R: SDR and Replay Mode From: "Giovanni Rotta" rottag@.......... Date: Fri, 7 Jan 2000 06:30:03 +0100 With the version 2.7 of SDR I have not problem. Have a nice day. Giovanni Giovanni Rotta Via F. Pizzigoni, 10 33010 Resia (Udine) I Lat. 46.373 N Long. 13.305 E rottag@.......... http://www.resianet.org ----- Original Message ----- From: barry lotz To: PSN-L Mailing List Sent: Thursday, January 06, 1983 2:30 PM Subject: Re: SDR and Replay Mode > Meredith, Larry > I think I have a similar situation. With the Santa Cruz 6.0 event , the > event spanned over a two day local (Pacific) time. When I replayed or tried > to save the event with a display window that spanned the full event time, > it stopped at the end of the first days record and I couldn't save the > file. If I set the replay display window to a short time( ie stop before > the end of the first day ) but saved a 60-70 sec window, it save the file > fine. It may be in the display routine and not the save section. > Barry > > > meredith lamb wrote: > > > Hi all, > > > > Am running SDR V2.71 and trying to use the replay mode and > > consistently getting the "not found" screen notice. Actually, I've > > had older versions and unfortunately have never been successful. > > Otherwise the program itself runs fine. > > > > Checking under the windows 95 system, the program shows > > the SDR program contents as: > > > > (file)0001(year/month) > > chan1.002 > > chan1.003 > > chan1.004 > > chan1 > > etc........showing other channels > > > > The replay mode screen shows: > > > > File C:\SDR\Chan1.001 not found. - Press Any Key > > > > NOW......under SDR is a listed year date subfile: > > > > 0001 > > > > With nothing in it. Maybe this is where the data should be, > > but its empty. > > > > Any resolutions or suggestions? > > > > Thanks, Meredith Lamb > > > > > _____________________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email listserver@.............. with the body of the > message: leave PSN-L > _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: AC-DC, DC-DC modules From: S-T Morrissey sean@........... Date: Fri, 7 Jan 2000 00:37:32 -0600 (CST) Barry, I have recently purchased some DC supply components from Newark and Jameco: Newark: 83F9250 Dual DC-DC, +,- 15V, 67ma, 12-18Vin $14.47 83F9256 Single DC-DC, +15V, 133ma, 12-18Vin $14.47 (Many other 2-watt options are available, like 12 Vout at higher I; I then further regulate the +,- 15 V to +,-12, to 0.001%.) (I use a AC-DC wall-brick for the raw DC source.) Jameco has the DATEL 3-watt "BWR-15/100 D12" DC-DC supply: 12Vin, +,- 15Vout, at 100ma, Cat# 155782, for $7.25 (usually about $40 from Newark) Also a collection of AC/DC wall modules, like #129331, 12V,800ma output, $6.95. They also have lower I for as low as $4, so use two. (Jameco: 1 800 831 8242) These last two will let you make a well (0.1%) regulated supply for under $15. Regulation at 0.1% is adequate for most seismic amplifiers, but better stability is needed for a fedback instrument. The DATEL unit is 3cm x 2cm x 1cm high. Regards, Sean-Thomas !p _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: SDR and Replay Mode From: Larry Cochrane cochrane@.............. Date: Thu, 06 Jan 2000 23:08:49 -0800 Barry, The problem Meredith is having is he can't get the replay mode work at all. I just email him a list of instructions to try to debug the problem. SDR should be able to create an event file that spans over midnight but you can not create an event file longer then one day, or 23 hour 59 minute 59 seconds in length. If you are having problems with creating a file the spans over midnight, either local or UTC, please let me know. This works fine on my SDR systems, but I run my systems on local time and supply a UTC offset. This problem may have to do with running the system on UTC time and setting the UTC offset to 0. So, if you run into this problem please let me know if you are running your system on local time or UTC time. -Larry Cochrane Redwood City, PSN At 05:30 AM 1/6/83 -0800, you wrote: >Meredith, Larry > I think I have a similar situation. With the Santa Cruz 6.0 event , the >event spanned over a two day local (Pacific) time. When I replayed or tried >to save the event with a display window that spanned the full event time, >it stopped at the end of the first days record and I couldn't save the >file. If I set the replay display window to a short time( ie stop before >the end of the first day ) but saved a 60-70 sec window, it save the file >fine. It may be in the display routine and not the save section. >Barry _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: computer power supply From: "Jim Cristiano" cristiano@........... Date: Fri, 7 Jan 2000 07:50:38 -0800 -----Original Message----- From: barry lotz To: PSN-L Mailing List Date: Thursday, January 06, 2000 5:59 PM Subject: Re: computer power supply >What I'd like to find is an inexpensive dual output "wall wart" rather than a >single output one and have to split the output with an opamp. >Barry Hi, Just buy two 12V wall adapters and tie the + of one to the - of the other and that is your ground. Now you've got a +/- w/ gnd power supply. Slap on some regulators if you want. Jim Cristiano _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: computer power supply From: ted@.......... Date: Fri, 7 Jan 2000 11:31:20 -0500 Larry sells a "wall wart" power supply for his amplifier cards which provides +/- 15V AC with ground from a single module. I guess he rectifies that to DC on the amplifier card. I like this arrangement because there is no 115V power anywhere any of us (or a kid) can reach it. I don't know if he has an unlimited supply of these or not. Regards, Ted "Jim Cristiano" on 01/07/2000 10:50:38 AM Please respond to PSN-L Mailing List To: "PSN-L Mailing List" cc: Subject: Re: computer power supply -----Original Message----- From: barry lotz To: PSN-L Mailing List Date: Thursday, January 06, 2000 5:59 PM Subject: Re: computer power supply >What I'd like to find is an inexpensive dual output "wall wart" rather than a >single output one and have to split the output with an opamp. >Barry Hi, Just buy two 12V wall adapters and tie the + of one to the - of the other and that is your ground. Now you've got a +/- w/ gnd power supply. Slap on some regulators if you want. Jim Cristiano _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: computer power supply From: Larry Cochrane cochrane@.............. Date: Fri, 07 Jan 2000 16:22:23 -0800 I have them in stock and can get more. The cost is $15.00 + shipping. -Larry Cochrane Redwood City, PSN At 11:31 AM 1/7/00 -0500, you wrote: > > >Larry sells a "wall wart" power supply for his amplifier cards which >provides +/- 15V AC with ground from a single module. I guess he rectifies >that to DC on the amplifier card. I like this arrangement because there is >no 115V power anywhere any of us (or a kid) can reach it. I don't know if >he has an unlimited supply of these or not. > >Regards, Ted _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: computer power supply From: barry lotz gbl@....... Date: Fri, 07 Jan 2000 17:44:49 -0800 Ted Yea, that's probably the way to go. I'll put a full bridge rectifier etc... Currently ( no pun intended) I use a 24 vt center tap transformer to 115 vts. I agree with the wall power concern. I like Sean Thomas's idea of higher voltages. I have been so brainwashed into lower voltages that I lost the advantage of higher voltages in AD resolution. Barry Larry Cochrane wrote: > I have them in stock and can get more. The cost is $15.00 + shipping. > > -Larry Cochrane > Redwood City, PSN > > At 11:31 AM 1/7/00 -0500, you wrote: > > > > > >Larry sells a "wall wart" power supply for his amplifier cards which > >provides +/- 15V AC with ground from a single module. I guess he rectifies > >that to DC on the amplifier card. I like this arrangement because there is > >no 115V power anywhere any of us (or a kid) can reach it. I don't know if > >he has an unlimited supply of these or not. > > > >Regards, Ted > > _____________________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email listserver@.............. with the body of the > message: leave PSN-L _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: SDR and Replay Mode From: barry lotz gbl@....... Date: Fri, 07 Jan 2000 18:11:36 -0800 Larry I have no (direct) problem saving an event that spans midnight (local time). I just have to go thru a little more to do it. First I'm using V2.7. My usual routine is to replay a time window which spans the event. I then go back and save the same. The problem I encountered was when I tried to replay a time window which spanned midnight the computer plotted the time til midnight and then said "End of file- Press esc to quit , S to save data, N for next day". The S option gives an "err : unable to save data- press any key ". Only esc works. The way I got around this was to -replay- a time window that stopped before midnight( say only 10 min) so I didn't get that message, but -save- the time window I desired (say 80 min). I have the "UTC" offset set to -8. I don't know if this has anything to do with it but I can't seem to be able to free enough conventional memory to run DOS while in SDR . It is perhaps t