eddiekaiger
Registered User
Join date: Sep 2009
21 IQ
#1
So I bought a used Vox AC30CC2 amp without playing it (regrettably). After tweaking everything possible, I've realized the gain isn't working properly. I play in the Top Boost channel with Top Boost Volume all the way up and the sound still comes out clean. Any suggestions?
R45VT
Doesn't speak guitar
Join date: Dec 2009
1,110 IQ
#2
Quote by eddiekaiger
So I bought a used Vox AC30CC2 amp without playing it (regrettably). After tweaking everything possible, I've realized the gain isn't working properly. I play in the Top Boost channel with Top Boost Volume all the way up and the sound still comes out clean. Any suggestions?


Does the knob feel different when you turn it?
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eddiekaiger
Registered User
Join date: Sep 2009
21 IQ
#3
Quote by R45VT
Does the knob feel different when you turn it?


The knob itself, no. There's a very minor difference when the volume is low to when it is all the way up. The overdrive just sort of peeks in when the volume is full, but it's practically unnoticeable and it's nothing compared to the gain of most AC-30s.
N_J_B_B
Nicko.
Join date: Jul 2006
1,326 IQ
#4
Have you checked the tubes?
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jthm_guitarist
"funny" but "unmemorable"
Join date: Apr 2006
1,474 IQ
#5
Could need new tubes, but make sure it isn't the guitar or the cable.

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Slap-happy
Registered User
Join date: Feb 2008
994 IQ
#6
Try cleaning the gain pot - use contact cleaner. A small amount of dirt in there could affect the connection which would result in no/limited operation and functionality.
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eddiekaiger
Registered User
Join date: Sep 2009
21 IQ
#7
Quote by jthm_guitarist
Could need new tubes, but make sure it isn't the guitar or the cable.


After doing a bit of research, all the signs point to the problem of the preamp tubes. I'm not sure why I didn't think of it right away, but I guess it's because I've never had any tube problems before. I just took out the preamp tubes and one of them looks like it's definitely dead. I'll get them replaced tomorrow. Thanks for all the suggestions, guys!
Cathbard
Grumpy Old Tech
Join date: Oct 2009
2,565 IQ
#8
It's V1 isn't it?
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