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Repairing C414???

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Repairing C414???

Postby Stephen C » Mon Jan 12, 2009 3:59 pm

Anyone know of the cause of noise on a C414EB? its a common fault, and no its not the tantalums, I've already tried that.

Thanks,
Last edited by Stephen C on Fri Jan 14, 2011 2:36 am, edited 1 time in total.
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Postby rob » Mon Jan 12, 2009 5:48 pm

dirty capsule?

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Postby Stephen C » Mon Jan 12, 2009 11:57 pm

Thanks for the suggestion Rob. Nah, I tried a capsule from a 'clean' mic and the noise was still there. Tried replacing the 1Giga ohm resistors and the FET, but no improvement.
Last edited by Stephen C on Fri Jan 14, 2011 2:36 am, edited 2 times in total.
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Postby Stephen C » Wed Jan 14, 2009 6:29 pm

Ok it was a wire broken inside the insulation going from the PCB to the output transformer. How that happened inside a microphone I don't know.
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