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In Reply to: RE: What's going on with them posted by airtime on July 08, 2016 at 06:45:26
Problem one. They will play for a while could be months and then a tube will glow I mean red hot, I can shut it down and start it up again with a new tube and same problem.
Gone on for years
A guy I know said put new quad cap in them(bought them) and he GAVE Me a set of boards but they have the stuffing but have to be soldered on and put on. I figure do that have all the sockets tested and wiring and I will be in good shape never thought it would take this much time and no one in the area who works on them I live in Baltimore Maryland.
John
Follow Ups:
That's funny! I had the same problem with my Mark IV's, but it was more intermittent. It only happened once but it scared the crap out of me because the output tubes on one of the amps when cherry red. I turned it off and let it sit. It worked fine after that. I never found out the problem because one amp got ripped off by a shop that went out of business when it was in for repair. I sold the other one.
Dave
Have you read and then implemented Jim McShane's "Tube Problems" That Aren't Tube Problems in the Asylum's FAQ? (link below)
Make sure the amps are unplugged, and the power supply caps are discharged. Clean the sockets using the method Jim describes, and tighten them using a dental pick (if you have one) a round toothpick, a sharpened chopstick, etc.
Tube amps require more maintenance, sad but true.
Hopefully you'll be able to find someone locally to help you for what you can't do yourself. I thought that finding a local Ham radio operator was a excellent suggestion.
Good luck.
I will check out your suggestion on the cleaning and read up on it appreciated. I was talking to a friend this morning and he showed me this audio set up that the guy he is renting to and how he builds his own speakers etc. So I said how about tube amp repair and he told me he has a guy who does all his work for him so might of stumbled onto a good repairman. Told me give him a week and expect a phone call. See how it goes.
If not him put me in the group of guys into the vintage audio I love listening to so much. Plus the other guy could look over my maggies the old ones and JBL's and Heresy Yea I bought up a bunch of audio several years ago before everyone went crazy with the prices. I was told from a friend what to grab and what to pass on. And he knew what he was talking about.
Thanks again.
Might work out.
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