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 Post subject: Flash of light
PostPosted: Mon Sep 11, 2017 9:48 am 
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Mark III
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Joined: Sun Mar 07, 2010 3:51 pm
Posts: 427
Location: NY
When I turned on my amp the other day, from standby to on, I heard a loud "pop" through the speakers and saw a bright flash of light in one of the power tubes. I turned it back to stand by, inspected and then back to on. No noise and no flash of light. I've turned it on and off several times since with no issue. It's performing as well as ever.

Now I know, that a flash of light within power tubes can be a signal of near future failure. The tubes in there now are about 7 years old.

Should i just replace or let them go a while longer and just monitor?

Thanks

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1991 Mark IV A


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