Re: Bad Tubes in Preamp?
Pre amp tubes don't glow blue like power tubes, and they last for years. they might become micophonic and you can usually tell just by tapping on them with a pencil while your pre amp is on. wiggling them around a bit might expose a loose tube socket connection...
you problem doesent seem like a bad tube. seems more like a capacitor or loose solder joint.
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Cheers,
Adam
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