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One of my tubes destroyed? o__O

post #1 of 9
12/23/12 at 12:07am
Thread Starter 

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.

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post #2 of 9
12/23/12 at 12:56am

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.

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post #3 of 9
12/23/12 at 1:05am
Thread Starter 

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.

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post #4 of 9
12/23/12 at 1:43am

A tube dying after four years is quite normal. I hope the problem will be resolved soon!
 

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post #5 of 9
12/23/12 at 1:49am

Tubes die, thats the nature of the beast.

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post #6 of 9
12/23/12 at 2:19am
Thread Starter 

The amp hasn't been in use for all the time. The previous owner used it for a year, he told me. I've been using it for a month or so now.

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post #7 of 9
12/24/12 at 1:30am
Thread Starter 

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?

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post #8 of 9
2/6/13 at 5:53am

If you can get Telefunken tubes. Great combination with the Luxman.

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post #9 of 9
2/6/13 at 7:24pm
Thread Starter 

I bought a full set of PSVANE T-Series tubes. I'm still waiting for the pre-tubes though.

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