In a message dated 11/20/02 3:01:56 AM GMT Standard Time, Kplblange@....... 
writes:


>     I do not wish to go to digital for several reason. I have the Lehman and 
> 
> used it for several years with a strip-chart recorder.  The cost of ink and 
> 
> paper became prohibitive and I turned it off.
>     I want to find a drum recorder and have had no success in finding a 
> source. Can anyone help me? I can repair it bother mechanically and 
> electrically. I think the seismic labs are phasing them out and I wonder 
> where they are going.

Hi Ken,

I have two Sprengnether drums brand new in the box, never been unpacked. You 
can have one of these for $50 if you will pay the shipping charges. They are 
packed in the original wooden crates by Sprengnether and ready to ship. They 
are the top-of-the line Sprengnether drums only. You will have to mount a pen 
motor on them and a pen. You can then scotch tape a piece of plain paper onto 
the drum to make a classic analog seismogram. Alternatively you could run the 
drum with photosensitive paper that Sprengnether designed them to use. The 
manual and the optics and everything you need to do this is packed in the 
crate with the drum. It consists of a beautiful very sensitive galvanometer 
that reflects a light beam onto the photosensitive paper to draw the line. 
The galvanometer is sensitive enough to record the seismic signal directly 
from a seismometer without an amplifier. The output of your Lehman would 
probably drive it without amplification.

Best regards,
Cap
(Casper Hossfield.......New Jersey)
In a message dated 11/20/02 3:01:56 AM GMT Standard Time, Kplblange@....... writes:





    I do not wish to go to digital for several reason. I have the Lehman and 

used it for several years with a strip-chart recorder.  The cost of ink and 

paper became prohibitive and I turned it off.

    I want to find a drum recorder and have had no success in finding a 

source. Can anyone help me? I can repair it bother mechanically and 

electrically. I think the seismic labs are phasing them out and I wonder 

where they are going
.



Hi Ken,



I have two Sprengnether drums brand new in the box, never been unpacked. You can have one of these for $50 if you will pay the shipping charges. They are packed in the original wooden crates by Sprengnether and ready to ship. They are the top-of-the line Sprengnether drums only. You will have to mount a pen motor on them and a pen. You can then scotch tape a piece of plain paper onto the drum to make a classic analog seismogram. Alternatively you could run the drum with photosensitive paper that Sprengnether designed them to use. The manual and the optics and everything you need to do this is packed in the crate with the drum. It consists of a beautiful very sensitive galvanometer that reflects a light beam onto the photosensitive paper to draw the line. The galvanometer is sensitive enough to record the seismic signal directly from a seismometer without an amplifier. The output of your Lehman would probably drive it without amplification.



Best regards,

Cap

(Casper Hossfield.......New Jersey)