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Old June 12th 18, 05:36 PM posted to rec.aviation.soaring
JS[_5_]
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Posts: 624
Default Radio Squelch - Electrical Noise Problems

A tool can be made, using a single-coil guitar pickup and a headphone amplifier, to detect noise sources. Managed to get a 400A 3-phase 400v analog stage lighting system quiet using one.
If there was an FSG71M handy, suppose it could have been substituted as a minesweeper.
Good luck,
Jim