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
i'm sure you already have, but check the fuses on your amp. you probably have a bad 6550 as mentioned which caused your fuses to blow. good luck.
Well guys I looked at the fuse and it looks fine. I don't know how to test it. I'm afraid that Ecclectique is right and a bad tube took down some resistors or something like that. I guess tomorrow I'll take it over to Deja Vu Audio and see if Vu's tech can take a look at it. What a bummer! Anyway thanks for the responses everyone, I'll let you know how it turns out.
Cheers,
Ecclectique might be right.
usually the faulted resistor looks bad and acts either as an open ckt(very similar to a fuse i.e. as a part of ckt protection).
ah, the many joys of tube amp ownership. almost makes me want to go back to solid state. almost.
you haven't told us what type of amps you have but...
on my Cary SLAM-100's there are TWO fuses per monoblock - one's just for the tubes and I forget what the other's for - and I have had situations where one of them blew and there was no sound but the tubes still lit up fine.