reverb pan inspection

[montesada]

Hi, I'm checking out the non-functional reverb on my Beta Lead combo and upon disassembly have found no breaks in continuity or other obvious breaks or burned spots, but I did notice something that may or may not be right. The RCA input and outputs have two wires, one black going to the outer part of the jack. On the output jack, this is grounded to the chassis, on the input it's not. Is this strange?
If that's not it, what other checks can I make with a multi-meter?

[Wally]

I am not familiar with that amp's set-up, but if you have an ohmmeter, you can check this out. See if there is continuity from the ground on the both of the tank's jacks to the chassis. It may be that ground is made for both cables through only one ground at the chassis.
AS for the tank, check the resistance of each transducer. You do this at the jacks. I am not sure what resistances you should read, but if you have an open circuit at a transducer, then the tank is bad.

[mckinnon audio]

  Hi there,the ground is isolated at the input to the tank and grounded at the output of the tank to keep it quiet and to avoid a feedback loop.Not all tanks are like this,some are isolated and some are not.Hope this helps,Mel.

[montesada]

Yes that helps, thank you.
I think the problem may be elsewhere, because when I try channel B with the reberb up and the level and master vol. all the way down, I get some sound out of it, but it's buzzy, and the reverb springs start oscillating, and the sound sustains a long time. It doesn't happen on channel A at all.