Chuck...first off, nice work! So I see you had replaced a lot of stuff. And I am wondering about a lot of things. Should I ask here or would you rather take it to PM's or e-mail? Thanks, Kirk
Either way. But, keep in mind, I just followed instructions others have posted in various DIY forums. I didn't re-design anything. I can follow a schematic to stuff a circuit board, but I really can't design/re-design a circuit.
I started testing the moded mics this morning, while watching the Broncos lose to SF.
One of the bodies has 4-6dB less gain than the other and has a slightly different self noise sound. There is a 4v difference in the voltage getting to the capsules from the bodies. I have to admit that I don't have much experience working on transistor circuits. Op-amps I know pretty well, but transistors and biasing is not something I have done before. If biasing is even the problem
I replaced most of the resistors (hand matched values between mics) and capacitors, but left the main transistor 2SK170BL biasing resistors alone. I also didn't change any of the transistors.