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Post subject: hot rod deluxe....
Posted: Sat Sep 04, 2010 1:03 am
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Joined: Sat Sep 04, 2010 12:41 am
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hello everybody!
I've bought a hot rod (second hand). it worked great but recently, the sound is no more clean after 5 min or so (it sizzles and distorts badly) even on the clean channel! the power remains the same...
what's the cause of that? tubes?
"you better go to a technician" you tell me!
if you had an answer and help me!
thanks for your answers!
Lou


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Post subject:
Posted: Sat Sep 04, 2010 1:51 am
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Any idea how old the electrolytic caps in the main power supply? Sometimes, when they dry out the amp gets this odd harmonics and overtones. Which maybe in addition to humming. Just my WAG.


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Posted: Sat Sep 04, 2010 2:15 am
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hello!
well, i don't exactly but the amp is quite recent... 2008 or so...
the first owner didn't play a lot with it 'cause i bought it with the labels included...
anyway, it could be right...


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Posted: Sat Sep 04, 2010 5:15 am
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Dang caps should still be ok, if amp is only 2 years old. Maybe usual suspects. Try cleaning the tube pins and sockets with some contact cleaner. Check bias. And hope for the best.


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Posted: Sat Sep 04, 2010 6:17 am
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Check the power tubes if bad put new one WITH a bias adjustments.

The phase inverter tube might be bad too. This tube is close to the power tubes


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