Is there an amp doctor in the house!!!

[goldtopchas]

OK, I was playing my blackface super reverb the other night and it started to fade out. Before I could get to the switch, it popped the fuse. I replaced the fuse and it powers up. If I leave it on standby all is ok. When I switch the standby to on, the rectifier quickly glows cherry red and I have to shut it down before it blows the fuse. Any ideas? Do you think the trans. is shot? I recapped it recently..but have played it a good bit at high vol. with no problems.

I changed the rectifier before the gig. (I like a 5Y3GT at home for practice,but need more headroom on stage and use a gz34). I reset the Idle bias when I swapped the rect., like I always do. but obviously, something's wrong.
When I check the bias now(quickly, before I shut it down ) it's not registering ...O on the meter. I swapped the rectifier tube and it's the same. swapped power tubes, and it's the same.

Please don't bother saying "Take it to the shop" I'm a stubborn S.O.B. and insist on figuring this stuff out and doing the work myself. Thanks for any help you can provide.

 

[Light]

Pull all the tubes, and then turn it on, but leave it in stand-by. What are the voltages coming from the PT. If any of those are wrong, you probably have a blown PT. They should be a little high because it is not seeing any load.

My guess would be a bad rectifier (and if it wasn't before, it is now, what with glowing red and all).

But to be frank, stuborn or not, you should take it to a shop and get it checked out. Certainly, they can do a better job than a bunch of guys on the internet who have never seen your amp.



Light

"Cowards can never be moral."
M.K. Gandhi