65 Twin Reissue problems

[Bart Pomeranz]

My amp 65 Twin Reissue worked good for a year than one day I turned it on and started usind the reverb with my Strat guitar and this was about 20 seconds after I turned it on. All was good. The reverb worked and I had the volume at 3 and all the other pots at 5 except the vibrato which I was not using set at zero. After about 30 seconds the amp started making a loud hissing sound that didn't stop till I put the reverb control knob to zero which also killed my volume even though It was still set at 3. So channel 2 wasent working. I pluged my guitar into channel 1 and that worked. I swithed the 2 12AT7 tubes and still had the same problem with channel 2. Then I unpluged the white ane red RCA plugs to the tank and got back channel 2 with no problems except no reverb. I don't use a foot switch so thats not being considered. I am thinking of how to test the tank. I am also wondering if it is posibable that both my 12AT7 tubes are shot.
Does anyone have any ideas?

[Jazz P Bass]

Maybe the issue is with V4: mixer 12AX7.
Swap it with Normal Channel V1.
The 12AT7 tubes work.
You proved it by installing each in V6, the phase inverter, which is common to both channels.

[Bart Pomeranz]

Switch V1 and V4 seemed to solve the problem.

Jazz P Bass
I dont know why but when I switched the V1 and V4 12AX7s "IT WORKED"!
Now the amp works better than ever. It is quiet and I played it over 1 hour on
both channels at once. Guitar on channel 1 and a mic with voice on ch 2 with reverb.
than I left it on stand by for an hour and it was still good. I am pretty sure
it is fixed but I don't know why it worked unless maybe the tubes matched up
better or fit tighter in their respective circuits? Do you think I should replace the 12AX7 that I put into the V1 Normal channel or just let it be?
Thank you for your help.

Bart

[Jazz P Bass]

If the Normal channel & the Vibrato channel both work, "Let It Be".