All, I found this link to the 1 hz geophone that Mitcham Industries is selling us: http://www.geospacecorp.com/hs10.htm. I don't know what the coil resistance is yet. I couldn't find any specs online for the 4.5 hz Mark L10B sensor. -Larry Cochrane Redwood City, PSN _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L)
Larry Cochrane <cochrane@..............>