Hi gang, Ad in Nutz & Volts: Geophone, 1.6" hi, 1.2" dia., made by Geosource, $7.95. The resonant freq. is not mentioned. www.gatewayelex.com Their web site offers (in Gadgets) only a kit (which incls. the geophone) for $9.95. Maybe a 'phone call to 1-800-669-5810 will get the geophone by itself. Bob __________________________________________________________ Public Seismic Network Mailing List (PSN-L)
Larry Cochrane <cochrane@..............>