Chosen Solution
I’ve just replaced the old 6L6 GT power tubes for JJ’s 6L6 GC. One tube didn’t light up so I’ve switched position and the tube light up, but the other tube don’t. I am guessing it’s something to do with the socket, but I’ve tried the old tubes and all still work… I appreciate your help on this, because it’s a bit mind bending. Thanks a lot, Paulo
@pmonteiro based on your tube description I assume you are looking at the reissue. you did not tell us which tube is not working. It is possible that it is the tube socket, but those do not usually fail easily. I would suggest that you measure the components connected for the tube in question. Attached is the wiring diagram so let us know what you find. It may further help if we can see what you see. Post some images of your amp’s board etc. with your question. for that use this guide.
You might have a bad capacitor or bad solder joint. If you can’t check for yourself, I suggest taking it to a competent repair man.
