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Noisy tube amp

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confused:
Thanks F1nut, the noise is really buried behind the signal in all but very quiet passages.  May have to listen to more dynamically restricted music.  Trying a new tact today.  As the noise stops after an hour or two of use, going to warm up amp until noise stops then spray individual components to cool them until noise comes back (hopefully).  Will get back with the results.

F1nut:
That's a good plan of attack.

confused:
SUCCESS!!! ;D  Turned out toi be a wiring problem.  Bypass cap not connected to ground.  By the way, while my buddy had it he checked frequency response and found it nearly flat to 30Khz he says.

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