Hello everyone. I was turning on my Luxman SQ-N100 just moments ago. There was quite a lightshow at one of the EL84's, all other tubes seemed fine. Naturally I turned it off after couple of seconds, to avoid any further damage. Any idea what could cause that? There was sort of purplish and orange light going on, didn't really get a good look at the short period of time.
One of my tubes destroyed? o__O
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Probably a defective tube. Some tube models flash-up at start but then it should have done it before and the other tubes also flash.
It could also be caused by a defective component in the amp (capacitor or resistor) but that is less probable. Mostly happens when the amp is 15+ years old. If you replace with a new tube and get the same type of flashing, it should be something with the amp.
Amp is only about 4 years old, so I hope the fault is not in the amp. I ordered a new set of tubes. Probably safest to test the possibly defect tube socket with one of the old tubes still working so I won't blow any of the new tubes.
I switched places with the presumably faulty tube and a working one. It's definitely the tube, which is a good thing of course. = ) Just waiting for new tubes now. By the way, I have two matched pairs on the way. Any tips on how to position them to the amp? One matched pair to the left and other to the right?