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Turner expander 500 mic- no audio

gmham555

Member
Jul 30, 2020
10
4
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Have a Turner expander 500 desk microphone here that I have just bought cheap, unfortunately although wired up correctly and fresh battery installed it’s producing no outgoing audio on my cobra 148gtldx. Meter on the microphone not moving on speech either. Battery test meter working. Going to try switch cleaner on the sliders failing that don’t know?!...anyone advise ?
 

Okay thanks for your reply and sorry yes appreciate a microphone of this age could have been retired or whatever in the 40 years it’s been out !
Have actually found what I am sure is the source of the very problem, seems like an earth wire has detached itself from somewhere ! Not sure where if anyone can advise ? Wire is the one circled and is connected to the main cable that goes up to the mic element itself . Thanks guys.
 

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