No sound tube wont light up

1 3k amp powers up but no sound Peavey Forum

Tube Amp Troubleshooting 101

Amp turns on no sound tubes wont light up

Peavey 6505 Amp turns on no sound power tubes don light

There is a fuse in the heater power to the tubes and also the pilot light. In some of the Valvekings it is labeled F203... not sure on your particular unit. In this one it is shown as a 3 amp fast blow. Since it feeds a bridge rectifier diode, it is possible a diode may be shorted or a couple electrolytic capacitors that follow the bridge.

Good day sir, changing the tubes won't solve the problem, sad to say it but you may need to bring it to a veteran technician, that knows tube amps. there are simply lots of things to check for. hope this helps, thanks

picture tube shot or conections to the tube faulty take to a tv repairman

The one that is arcing may be bad...slowly take the board off the bottom of that tube...then power on...If the other tubes light up again you found the problem.

press and hold the 2 outside buttons( the quick freeze and chill)

sounds like your feed tube might be partially plugged, or the orifice, you will need to disassemble the unit and clean it, normally a good dose of high pressure air will clear the tubing and orifice, check the tank too to see if you have any de-bree in it, hope that helps.

the problem is the thermocoupler. it is the other small tube next to the pilot light. this tube sends a signal to the main valve to let the fuel go through. sometimes you have to change the whole pilot unit.

the picture tube is most likely not out. but there is a problem in the high voltage transformer part of the set( this is what fires up the picture tube). a problem like that can be just as expensive as a new picture tube. if it's not still in warranty it would be cost prohibitive to repair.

sounds like either a tube is arcing or h.o.t is arcing.