Twin reverb help

[SacDAve]

I have a Twin Reverb II one channel has gone out. I haven't used the amp in years pulling out the Volume/Channel select switch or the foot switch I lose 90% of volume and what you hear is distorted in a bad way. Everything else works fine, the only thing I've done at this time is to spray DeoxlT on the tube pins a reset them. I'm looking for any suggestions what the problem might be. I've built quite a few Amps but troubleshooting i'm not very knowledgeable don't want spend much money on the Amp looking to sell it.

 

[Wally]

V2A and V4A are involved in that channel. If either of those triodes failed, you would have a problem in that channel. Note that V2B is the second ga8n stage in the clean channel. V4B triode is not used.
If a substitution of a known good 12AX7 does not cure the problem, one has to go inside the chassis.

 

[SacDAve]

V2A and V4A are involved in that channel. If either of those triodes failed, you would have a problem in that channel. Note that V2B is the second ga8n stage in the clean channel. V4B triode is not used.
If a substitution of a known good 12AX7 does not cure the problem, one has to go inside the chassis.

Thanks I’ll try that

 

[SacDAve]

Thanks I’ll try that

Changed the V2 all good Thanks Wally