I would have to tap it to get the audio working but I made the mistake of taking the mic element apart and broke the little flexible piece of material that goes between the diaphragm and the hold down arm. I think this changes ground potential as the diaphragm is vibrated. Since it's part of the inverting output that goes to the IC I have to match the impedance of the new element to get the right volume level. The K40 has a 100k resistor between the op amp and the mic element.
So far I've passed up on buying a K40 speech processor mic and two K40 speech processor radios on Ebay. They wanted too much. I figured I'd try my hand at getting mine work with the knowledge I now have about the mic.
So far I've passed up on buying a K40 speech processor mic and two K40 speech processor radios on Ebay. They wanted too much. I figured I'd try my hand at getting mine work with the knowledge I now have about the mic.
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