Gentlemen:
Regarding  a Lehman seismometer:

Is 30 gauge copper wire satisfactory for the coil, if so, how much
should I use.  I plan to put the wire on with a drill, but counting the
number doesn't seem possible.  The original design called for 400 ohms
of resistance.  Can anyone speak to this issue?

Yours truly,

Paul Jebb
NCS


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