Recent content by Kleinar

Hi Dave, I believe the device is a SM-24, it is 10Hz with a spurious frequency of 240Hz, I have read that the sensitivity of these devices is incredable. My experimentation is less noble than your field of expertice, but when you need help you go to the experts. My goal is to build a circuit...

Need some help, I need to convert the output of a small geophone (30mv to 1 v) to an audible signal so it can be recorded. The impedance is 375 Ω. Most available preamp circuits have a lower max input. Any suggestions? Thanks.