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PostPosted: Wed Dec 21, 2016 12:32 am 
Bottle Rocket

Joined: Wed Dec 21, 2016 12:11 am
Posts: 1
Hey guys, any help here would be appreciated.
I found a Studio Caliber amp at a local guitar store. Loved the tone but here's the deal: after trying it out on two different days, about 5 minutes after being turned on, the gain channel suddenly goes bad. It still produces sound, but volume level is drastically reduced, virtually no gain, and hum is heard big time. The sales guy first time removed and reinserted all the tubes and then tried it out and the gain channel was fine. He called me to say its ok now. Today I went in to possibly buy it, but after a few minutes of playing both channels, the gain channel did the same thing again. Clean (rhythm) channel is fine.
So it appears that when the amp and tubes warm up, something must overheat and screw up the gain channel.
The sales guy has no idea what the real issue is but says they'll mark it way down and sell as is.
Any idea what the problem may be and how expensive to fix? Thanks.

PostPosted: Wed Dec 21, 2016 10:29 pm 
Mark III
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Joined: Sun Dec 26, 2010 10:26 pm
Posts: 215
Location: Louisville, KY
Most likely a tube problem.

If it is, taking them out and putting them back in will do absolutely nothing to help.

Quad 295, Studio Pre 50/50, 50Cal+, Racktifier
4x12 halfbacks- 3 Top, 3 Bottom & 3 Road Ready
Jackson- KV2, DKA
Gibson- Faded Flying V & SG, SG-1, SGJ
Dean- Z79
Schecter- Hellraiser C7
BC Rich- Mockingbird ST
Ibanez- RG470, RG450, RG370DX

PostPosted: Fri Dec 23, 2016 6:36 am 
Donating Member

Joined: Fri May 01, 2015 6:50 am
Posts: 103
Sounds like dirty send receive jack connector issues.
Bridge the send to receive using a short lead and let us know if this doesn't fix the problem.
Had similar issue with the 22, sounded good for a while then just dropped volume and all weird.

MkV Combo Ltd Edition Export, Walnut
Studio.22 loaded '87
MkIIC| DRGX Combo '83, Imbuya
112 C90; 212 C90 (Mark); 412 V12; Hartke 410
[size=85]'73 Tele Deluxe; LR10; LKS custom; Ibanez Silver Series; Yamy SF700; Tokai Strat size] (need real guitars)

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