Thanks a lot Larry. I appreciate your answer. Ed. ----- Original Message ----- From: "Larry Conklin"
To: Sent: Saturday, December 30, 2000 11:25 AM Subject: Re: Lehman seismograph > Ed, > > I have my SG sensor sitting on my concrete basement floor, and it is working > ok. It has rather small leveling screws and I was having a problem with the > thing getting out of level for no apparent reason, every day or so. I > solved the problem by gluing a couple of aluminum plates to the concrete for > the leveling screws to sit on. I'm guessing that adjusting the leveling > screws was grinding the concrete surface and leaving a little dust under the > screw that made the foundation a little "flakey". I suspect that unless > your leveling screws are completely free of the carpet you're likely to have > similar problems. > > Larry Conklin > > > ----- Original Message ----- > From: "Ed Ianni" > To: > Sent: Saturday, December 30, 2000 10:27 AM > Subject: Re: Lehman seismograph > > > > Subject: Re: Lehman seismograph > > > > > > > Hi PSN members. Thanks for welcoming me to the PSN network. I have > > recently decided to build the Lehman seismograph.. I have completed the > > Transducer part of my "Lehman" and I am about to build an amplifier (which > I > > dread[can they be purchased or "requisitioned" anywhere])?. I have a small > > problem though and I hope that you may have some thoughts on it. The only> > > feasable place for me to place the seismograph seems to be in my basement > > > which has a thin carpet in it over a concrete floor. Do I need to cut > the > > > carpet away(the size of the Lehman base)? What do you think of the idea > of > > > using VERY LARGE and SHARP screws that would penetrate the carpet and > they > > > can also be used for Leveling? I have heard of some people using their > > > seismographs on other than the ground floor (wouldn't the waves be > > baffled/diminished)? > > > Any thoughts would certainly be appreciated. Thank you very much, Ed. > > > > > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. > __________________________________________________________ Public Seismic Network Mailing List (PSN-L)
Larry Cochrane <cochrane@..............>