Hi all,
Anyone know of a source of cheap 10 Hz or better geophones or geophone=20
cartridges?  There's a guy selling kits including a cartridge and=20
display board on Ebay for $26+$8, but I was holding out for even less. =20
I was interested in 8 or so.  I think All Electronics used to have
some but they're not in their catalog anymore.
Thanks,
Jack
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