PSN-L Email List Message

Subject: Re: Downloades from the ftp server I created for PSN folks
From: "Geoffrey" gmvoeth@...........
Date: Mon, 28 Dec 2009 16:56:38 -0700

Hello sismos;

Some folks like from europe are having an impossible time
downloading, its so slow and random for them.

I played with the ports and it would get them
going a bit but they stall again and again.
So i just opened up all the ports.

The can on the left near the input cable
is actually two cheap metal pans held together
with big paper clips contains two things
I found them in the dollar store.

a. a manual tester thing with alligator clips
to test input from the geophone as well as timing
b. the tone decoder from the sw radio with wwv audio
   used to synchronize the ring counter ( fancier than it sounds )
 The can which it feeds is that timer to be set with wwv.
  The timer is a custom kit from an austrailian company called DIY
  kit 141 I think.

The can on the right next to the computer contains the A/D converter

I put these in cans because they are with their oscillators
terrible generators of RFI.

The strip in the middle is the amplifier, equalizer, antialize filter.
This is feeding the 12 bit A/D converter.

The two identical circuits are +/- 3.00V regulated power supplies fed by
the 12vDC modules connected to the UPS power supply.

Hopefully but possibly not the UPS should keep the
recorder going if the power fails for a single record 45
minutes long.

The sound was all from my SW radio first listening to WWV
then with the BFO on then with FM selected.

I made the MOV file with a Kodak digital camera then combined the
video with sound using a freeby cinverter to make the AVI
takes a bit of messing around to make it all work.

I have one remaining trouble Im unable to solve
and that is high static electricity and
RFI from police or fire or ??? Radios in the area
disturbing the serial communications causing
the program to develope a runtime error stopping
it cold in its tracks and requires me to reBOOT
the computer.
I am never sure what stops it cold but occassionally
this happens. Possibly building the thing right
would solve that problem.

It is only a prototype suitable for lab
environment and not the public.

It is not properly constructed due to
opportunity costs I would incurr to make
it be right.

Hey, its only a hobby to keep me out of trouble.
Its all old technology. From the public domain.

I will someday make a video with all the covers off
or put the scematics into a folder for you to download.

Everything is on an aluminum sheet and surrounded
by salt water to moderate the temperature changes.

Everything is designed for common mode over differential noises
of whatever kind.

Proper grounding/shielding is one of the most troublesome things
to conquer.

Hope it answers most of your questions ??


----- Original Message ----- 
From: "sismos" 
Sent: Monday, December 28, 2009 3:17 PM
Subject: Re: Downloades from the ftp server I created for PSN folks

> Hi Geoff,
> I downloaded the AVI file just minutes after you posted the link.  I
> live in Panama.  It only took a few minutes, quite fast actually.
> I have to admit that the video was strange and looked more like a home
> canning operation than a seismic station. I say this kindly because my
> station look more like rats nests than seismic stations. What is in all
> the jars?
> I really like reading your post.
> Saludos,
> Angel
> On Mon, 2009-12-28 at 14:01 -0700, Geoffrey wrote:
>> Hello PSN;
>> I would like to let you know that everything within the scratch folder
>> is OK for you to download.
>> I have been watching the last several hours the progress
>> of several downloads and come to the conclusion
>> there is some kind of interference with connections
>> that cross the USA border.
>> It may not be possible for Non-USA people to
>> download these files in a timely fashion.
>> But do not let you stop trying because like
>> always I could be wrong.
>> I will post just about everything related to
>> PSN or Seismology that I do here and it is not
>> intended for the general public but only
>> PSN peoples who I believe are truly
>> interested in seismology/geophysics/programming/instrumentation.
>> I will not be up 100% of the time.
>> Most likely Randomly between 24:00 and 12:00 UTC
>> when the net is least used here.
>> FTP SERVER IP:  ( NOT STATIC can change periodically by the ISP )
>> FTP       UID: PSN
>> FTP      PASS: PSN123
>> FTP     PORTS: 1024 to 65535 are open with passive ftp enabled.
>> FTP   CHANNEL: 20/21 I think are standard for FTP
>> It is for download only and not intended
>> to let people do P2P ( peer to peer ) stuff.
>> Don't laugh too hard since this how I have chosen to waste my life.
>> You guys are much more serious armatures than myself.
>> Be happy if you get better than 60KB/SEC downloads
>> because EUROPE was getting like 1K or less for reasons
>> not fully understood.
>> The limits are not my machine since everything
>> on the B drive is ramdisk ( very fast ).
>> The connection is A Gbit modem.
>> The limits has to be ISP or Backbone related.
>> Its all just to show you what I do here at GVA the best I can.
>> Question;
>> Not sure what official armature group [GVA] is a part of
>> to put into the PSN4 file header, possibly
>> someone can tell me in a personal email.
>> I will change the header from "123456" to reflect this.
>> A USGS expert person named Bruce Presgrave assigned me this designation.
>> But all I know is [GVA] and not any parent organization.
>> Regards,
>> geoff
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