[beat]

Hello all,
If your amp has 4 el34 tubes and suppose one went bad, do you need to replace all 4? I'm learning..
BTW, if one tends to light up like a gas powered light bulb and causes your power fuse to blow you could assume the tube is bad, right

[markC]

It sounds like that tube may have a short, but I would measure the voltage at the tube socket to make sure nothing upstream has gone wrong.