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I have a Carver C-15v preamp well it haves noise in the record player mode only. I need a schematic and help.

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Get a can of cold spray from an electronics industry supplier.
it cools to -51 f.
you have a bad transistor in the phono stage.if you spray it with freeze,the noise will go away.
i would just replace those transistors,
some have an op amp like a ua741 8 pin chip.
that will cause the same problem.
there is a fet version of the op amp,same problem.
if you get an audio tracer,you will hear the noise,and where it is coming from.
you can use an oscilloscope,but they cost 1000 and up.
you will see the noise waveforms.

Posted on Sep 06, 2009

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