2. amps-preamps
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Help troubleshooting amp

Hi,
When I turned the system on this morning in anticipation of a long holdiay of music there was no signal in my right channel. I first checked all connections which were fine and then I subbed in a pair of replacement tubes for the right side of my preamp, still only on channel. I then switched my attention to my amp, I switched both pairs of 6550's from left to right. Now no signal in either channel! This leads me to beleive that the trouble rests with the amp. I'm going to try switching 6550's back again but one at a time to see if I at least get the left channel back. Regardless I'm pretty sure it's a tube issue but if anyone else has any ideas I'm listening. Why do these things only happen on weekends and holidays?
128x128jond
unclejeff
1,313 posts
 
Try switching them all back, then move them over again, one at a time, sassuming you were able to get the left channel back.

I don't know what you will learn, except that it might just be a bad tube.
jond's avatar
jond OP
5,807 posts
 
Unclejeff,
I switched them both back one at a time and now I can't get any sound at all. The really wierd thing is all of the tubes light up and appear fine. I really can't figure this one out.
Thanks,
jea48
4,425 posts
 
>>"I switched both pairs of 6550's from left to right. Now no signal in either channel!"<<
>>"This leads me to beleive that the trouble rests with the amp."<<
>>>>>>>>>>

Just a guess, a bad shorted 6550 tube. The bad tube may have damaged something in the right channel. Installing the bad tube in the left channel may have caused damage there as well.

Post a thread on Audio Asylum on their tube forum and ask your question.
http://www.audioasylum.com/audio/tubes/bbs.html
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