Scott Dorsey wrote:
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Beyond that point you're going to be checking the RF stuff.
I have seen the silver mica caps go bad and the oscillator
frequency drift way off once,
** While silver mica caps certainly can go short, the MKH405 uses an 8MHz crystal.
http://www225.pair.com/audio/waltzin...er/MKH-405.htm
Anything might go wrong with a 50 year old RF mic.
...... Phil