Bob,
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I have bought some very old and dirty microphones at flea markets or recycling stores. I am not a professional micbuilder, but I am always happy when I can find technical information about the microphones and give them a new life.
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Btw: I also searched on SHARC's website for 559156, but it seems the RCA handmic PDF is the only information they have.
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559156 site:https://sharc.net/
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Heinz
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On Thu, Feb 13, 2025 at 11:54 AM, Bob W8RMV wrote:
Heinz,
I looked again at the RCA handmic link you sent & think I found the schematic for mine.
It shows an unidentified PNP along with the resistors & cap that is on my mic's board.
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Thank you again!
-Bob
