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.
> > >
>
>
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