Amp problems

[DerekJ]

Originally Posted by briskmojo

The amp is a Traynor Custom 80. It seems to work fine with just two power tubes in (has been working like that for 4 years now) but plug in the other two and the amp makes a real ominous hum, turning the volume does not affect it, and the two tubes that it normally works fine with get super hot. Tried it with a few new sets of tubes and same results each time. Also the standby does not work.

As I said it works fine and has played dozens of shows over the past few years with no problems but I'd like to solve this if I could, any help would be appreciated.

Nonstop humming could be your recifier circuit. Hot tubes can be a number of things. Standby switch also? Did you drop it down a flight of stairs or something?

[Silent Sound]

That's a strange list of problems. They seem like they could be unrelated, but who knows. In any case, this sounds like a job for a qualified tech!

[nedorama]

Agree - time to take it to a qualified amp tech as it could be several issues.

[Matt Syson]

Hi
It doesn't sound particularly complicated but you won't fix it by wild guessing, it needs the doctor!
Matt S

[drbob1]

So, the two good tubes get very hot and red when you plug in the other two? Sounds like a bias problem, perhaps a bias resistor died and when you plug in the other two tubes you just get a huge "too hot bias issue". Anyway, you need a tech...

[fastlanestoner]

how many channels? if those power tubes control a different channel then that could be the culprit. could also be a socket issue, cold solder joint, any number of things