Tubes do not warm up. No sound out of amp.

[mexidan]

I have a Bugera 333 and recently i have been able to turn on the amp, light comes on, but cannot get the tubes to warm up at all. i have checked the fuse and it seems fine. i dont want to go out and buy new tubes until i know for sure that i need to.

power connector seems fine but i have heard that the connector pins often fail. a little while back i did have to re-solder some little green pin connected to the little board where the power chord plugs into. it had heated and burned off the original solder. but the amp worked for a while after that. can anybody help me solve this??

[R.G.]

I have a Bugera 333 and recently i have been able to turn on the amp, light comes on, but cannot get the tubes to warm up at all. i have checked the fuse and it seems fine. i dont want to go out and buy new tubes until i know for sure that i need to.

power connector seems fine but i have heard that the connector pins often fail. a little while back i did have to re-solder some little green pin connected to the little board where the power chord plugs into. it had heated and burned off the original solder. but the amp worked for a while after that. can anybody help me solve this??

Take your voltmeter and measure the voltage on the heater pins of the tube sockets. This will necessarily have to be done with the power on. A modestly safer way to do it is to poke the meter leads into the tube socket holes from the top -tube removed, of course. Notice that unless you already know how to work inside an amp with the power on without endangering yourself, you have no business poking around in there with the power plug in the wall. You could get electrocuted, and dead is forever. No amp is worth risking your life for.

New tubes will not help if no tube is getting heater voltage - which is what you describe.

[gomez63]

Take your voltmeter and measure the voltage on the heater pins of the tube sockets. This will necessarily have to be done with the power on. A modestly safer way to do it is to poke the meter leads into the tube socket holes from the top -tube removed, of course. Notice that unless you already know how to work inside an amp with the power on without endangering yourself, you have no business poking around in there with the power plug in the wall. You could get electrocuted, and dead is forever. No amp is worth risking your life for.

New tubes will not help if no tube is getting heater voltage - which is what you describe.

Agreed! Sound like the heater system is down.

[mexidan]

how do you think it will cost me to fix? im thinking of taking it to a trusted electrician who has worked on many tube amps before.

[R.G.]

how do you think it will cost me to fix? im thinking of taking it to a trusted electrician who has worked on many tube amps before.

There is absolutely no way to know. It depends on what is really wrong with it.

Could be a broken wire, could be a burned out power transformer. And then it depends on what the "trusted electrician" charges. He may charge you as little as nothing (for the trivial, simple, 2 minute fix) to more than a new amp would cost. There is no way to reasonably even speculate.

And there is sure no way to guess from four sentences on an internet forum. Not enough information.