HELP Flatulant Amp!!!! - Jemsite
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post #1 of 4 (permalink) Old 01-16-2009, 05:27 PM Thread Starter
Join Date: Apr 2008
Location: Syracuse
Posts: 83
Reviews: 5
HELP Flatulant Amp!!!!

I was playing a small gig today, and my Mesa Boogie F30 "quit" on me. I had it turned up louder than I usually do (around 1 o'clock) but I had taken the gain down, and I don't think this was the problem. All of a sudden, when I kicked my octave pedal on, the amp made an intermittent farting noise. BRRMP.....BRRRMP....BRRMP. I turned off the octave, and it went away, but then came back when I kicked my fuzz on (same pedal-Pigtronix Disnortion). I then turned off my amp, and plugged directly into it. It worked fine for a minute, then the same thing happened, on all channels. Someone had an old Peavey they let me plug into, and I had no trouble (amp or pedals-and I did use the Pigtronix) through that.

I retubed the amp (pre and power amp) with Eurotubes (which have been great) about a month ago. So, I'm unsure what the problem is. Anyone have ideas???
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post #2 of 4 (permalink) Old 01-16-2009, 07:18 PM
Join Date: Mar 2006
Location: london,uk
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Re: HELP Flatulant Amp!!!!

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post #3 of 4 (permalink) Old 01-16-2009, 07:31 PM
Join Date: Jul 2008
Location: UK
Posts: 1,641
Re: HELP Flatulant Amp!!!!

Sounds like the speakers have blown. The only other thing I know causes problems like that with speakers, is when the cabinet uses porting thats badly designed.
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post #4 of 4 (permalink) Old 01-18-2009, 11:36 AM Thread Starter
Join Date: Apr 2008
Location: Syracuse
Posts: 83
Reviews: 5
Re: HELP Flatulant Amp!!!!

So here's an update. I played around with it at home, and even with the dirty channel around 9:00 if I really dug into chords the same thing would happen. When I used the channel switch on the amp, it would happen too. Then I tried changing power tubes, and everything worked fine, even when pushed. The power tubes were only 4 months old, so I'm wondering if it is something to do with the fixed bias of the amp??? Or did I just blow the tubes? (I only play about 2 hours or less a week)
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