Carvin XV-212

I've owned my Carvin amp since '85, it's always worked fine.  One day while I was playing guitar, while at the same time my wife was vacuuming the carpet in the same room.  I heard a BB pellet go up the vacuum tube, and my amp within a few seconds went dead. There was no smell, no noise when it stopped amplifying.  The power light was still on, the power fuse and the speaker fuse were good. The tubes all were not glowing, the larger transformer was cold, but the smaller transformer was barely warm, with a faint hum.  No sign of any burn smell or visual damage could be seen on the circuit board.  I tested the speakers, they are both good.  All controls are DOA, and all tubes were changed last year. I only use my amp at home, and don't even turn the volume to (1) CAN ANYONE HELP-I can do my own repair if I knew what part to change.  I thought that someone out there might of had a similar problem, any advice would be greatly appreciated.

Otherwise your input tube went out.
 

 
Are there any solid-state circuits in your tube amp ?
 
If so, something might have gotten zapped by a static electricity discharge from the vacuum cleaning.
Did your wife touch you or your amp while cleaning ?  I once had so much static electricity building up on my vacuum cleaner's tube/hose that I wrapped it in wire and grounded it.
 
You sure that was a BB pellet and not a zap (or your circuits popping) ?
 
I doubt a vacuum tube (the ones in the amp) would be affected by a static electricity discharge, the parts are substantial metal.  A solid-state circuit board would have to be completely replaced, I imagine, and it might be hard to find one for an '85.
 
 

I also think it's a capacitor, I'm waiting for a tech from my area to get back to me.
He gets $80 an hour, I'm retired and only play as a hobby. $80 is the least it will cost,
it could cost me hundreds before I'm done. 

Yes,  but I'm with ampfixer on this one.  You said the tubes were all not glowing.  If they're not glowing, they won't work.
 
It's a very simple circuit, the mains power transformer will have a 5 - 6 volt output that feeds all of the tube heaters, maybe with a fuse inline, maybe not.  If the tubes aren't lit, there's your problem.

Even if something was burned out in the circuit leading to the tubes, you're saying the tubes will still be glowing?

I've had my fingers in there already, but only touching parts that were not metal, except the main body of the transformers.  The smaller transformer is the only part that was not cold.

For safety's sake. Get someone with some experience poking around a tube amp to help you.

Thanks,
There are too many things that can go wrong in a circuit.  I just hope it's not a transformer or the circuit board. I'll just take it to a tech, and hope that it's not too costly!

The tech has over 35 years experience, but $80 in the minimum charge per hour, with a one hour minimum.  That is OK with me, but if they bill me for (2) hours, I would say they were taking advantage.

Looking at the circuit diagram, the heaters are shown the same as in my Vox.  The good news, it limits the fault possibilities to just one of three things.
1)broken track on the PCB removing power from the heaters.
2)broken connection between transformer and PCB, where the wires connect to the PCB (the two brown wires connected to H1-4 and H1-5)
3)burnt out transformer.
 
1)is easy to fix.  2)is even easier to fix (and the most likely) 3)is the most expensive, but not difficult.
 
To reiterate what Mike said,  DO NOT stick your fingers anywhere inside unless you really know what you're doing.

ReubDot
The power light was still on, the power fuse and the speaker fuse were good. The tubes all were not glowing, the larger transformer was cold, but the smaller transformer was barely warm, with a faint hum. 

ReubDot
  When it stopped working, it first got lower in volume and distorted.  I turned it off, checked a few things on it, then turned it back on, then nothing. 

That really sounds like the 6v secondary winding breaking down.  It should be really easy for your tech guy to check for voltage from it.