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Discussion Forum for Mesa Boogie Products
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PostPosted: Thu Jan 09, 2014 3:08 pm 
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Bottle Rocket

Joined: Thu Jan 09, 2014 3:06 pm
Posts: 1
I have a Mesa Boogie F50 with 2 6L6s and 4 12 AX7s.

Lately when I play, after a few minutes the amp makes a horrible noise (nnnngggggggggggg) for about 5 seconds, then there's a slight pop and the amp makes no sound. After about 30 seconds, the volume comes back.

I bought the amp two years ago. Don't know when tubes were last replaced.

HELP!


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PostPosted: Fri Jan 10, 2014 9:58 am 
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Donating Member

Joined: Sat Oct 01, 2005 2:27 pm
Posts: 5447
Location: Maui Wowee!
Definitely don't run it anymore until you get it fixed!
I can't say for sure, but it sounds like a bad power tube plate resistor or a bad solder connection that is heating up.
Or...I had a DC-2 once that did this and it turned out to be the output transformer. It would play just fine at lower volumes, but would make the scariest noises when you cranked it.

Sounds like your amp needs to go to the Dr.

_________________
Elvis said.......
Quote:
Amp techs do get shocked. :shock:


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