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Little reverb problem with Fender PRRI

radcliff

Member
Messages
1,994
I turn on the Princeton - it's loud, dry, muddy, and the reverb isn't working. Reverb knob on 10 gives a low, faint buzz sound.

I take out the tank, unplug and plug it back in, move some 12AX7 preamp tubes around. Turn the amp back on. Sometimes after this and some jostling, the reverb is back in action and all sounds normal.

Then the next time I go to use the amp, reverb is inoperable and we're back to square one.

My list of possible culprits:
  • The tank itself - which seems fine (the springs are springy, although it does live in close proximation to a large speaker/magnet)
  • The cables leading from the tank to the chassis
  • The reverb-driving tubes (12AT7 - haven't tried a new one yet)
  • The reverb connection sockets inside the chassis.

Thoughts?
Thanks for any and all help:dude
 

radcliff

Member
Messages
1,994
With some searching, it looks to be the RCA jack contacts, the RCA able, or the reverb driver tubes. I will try all 3 and report back.
 

TimmyP

Member
Messages
2,485
If there's a problem with both the dry and the reverb, the problem would I think be either V2A, V2B, or V3A pulling the supply node down; or a problem with the supply - I suspect a bad solder joint or component in the supply.
 




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