Electret mic wiring

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  • Question
  • Updated 2 years ago
  • Answered
I have a Koss SB45 (has an electret condeser mic). Can the mic be wired directly to the Foster connector (pin 2 bias to ring, pin 7 to sleeve, pin 8 to tip)? Or must I add the current limiting resistor reistor and DC blocking capacitor? I am NOT buying some adapter, I am building my own. I want to know how to do this myself.
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Danny K5CG

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Posted 3 years ago

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Ray Andrews, K9DUR, Elmer

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Official Response
I have a Yamaha CM-500 headset which has an electret mic.  I simply wired tip & ring to pin 8 & sleeve to pin 7.  Then I turned on the bias in SmartSDR.  In the case of the Yamaha, you have to turn off the +20dB mic boost because the ,ic element is so hot..

73, Ray, K9DUR