View single post by EVPDave
 Posted: Dec 24th, 2010 12:35 PM
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EVPDave

 

Joined: Mar 7th, 2007
Location: USA
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 Since I haven't worked with this method in a few years I thought it was time to try it again. My induction microphone pick-up is broken so I had to improvise. I found I could use a Sonalert module as a sensitive contact microphone. I simply taped the sonalert so the diaphragm rested on the quartz heater control knob.

http://www.mallory-sonalert.com/specifications/SBM428.PDF

For excitation of the heater assembly I used a Radio Shack 'hack' set to AM band sweep.

As with the induction coil magnet set-up level setting is critical, very easy to overdrive.


This first capture I hear mention of "filters", this seems a popular topic..

"We have filters that impressed.....The corps of Engineers"

Attachment: 122210wehavefiltersthatimpressedthecorpsofengineers (2.1).mp3 (Downloaded 801 times)