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PostPosted: Thu Nov 17, 2016 4:47 pm 
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Mark I

Joined: Tue Aug 25, 2015 1:08 pm
Posts: 34
Howdy all

I just went thru a Mesa factory repair for a bad cap on my Express 525, now my TA15 is making light background percolating noises (random sizzle, scratching etc). Not very dramatic but certainly not what I'd call quiet background hum. Now what? Failing preamp tube somewhere?

Cheers

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Electrics: Collings City Limits Deluxe / PRS Custom 22 / PRS CE 24
Acoustics: Martin HD28V / Ovation 1778T Elite
Amps: Mesa TA-15 / Mesa ElectraDyne 1x12 Wide / Roland GA-112 / Genz Benz Diablo 60


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PostPosted: Mon Nov 21, 2016 7:14 am 
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Dual Recto

Joined: Fri Feb 22, 2013 7:31 am
Posts: 2645
Location: North Carolina
That would be my first assumption. Preamp tube. I would at least roll in a new tube starting at the beginning of the chain. EL-84 power tubes can do this too but not as common as a preamp tube. Hopefully that is all it is.

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PostPosted: Tue Nov 22, 2016 1:01 am 
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Mark IV

Joined: Fri Dec 06, 2013 1:08 pm
Posts: 503
Location: Ohio
+1. When I've had a tube fail slowly, that was decent description of what happened to my tone.

Or, if we were in Hawaii, I'd say, "Bubble, tiny bubbles..." :mrgreen:

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Mesa Boogie Mark V, Mark V25, PRS Archon, PRS Custom 50


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PostPosted: Thu Dec 01, 2016 7:58 pm 
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Donating Member
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Joined: Thu Oct 15, 2009 1:30 pm
Posts: 2536
Location: San Francisco Bay Area, CA
Tubes are awful creatures. None of us would use them if they didn't sound and feel so freakin' awesome.

Always carry spares.

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PostPosted: Fri Dec 02, 2016 12:59 am 
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Mark IV

Joined: Fri Dec 06, 2013 1:08 pm
Posts: 503
Location: Ohio
elvis wrote:
None of us would use them if they didn't sound and feel so freakin' awesome.


ain't that the truth!

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Mesa Boogie Mark V, Mark V25, PRS Archon, PRS Custom 50


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