Great info, thanks for your effort. The pedal has not caused this problem outside the loop, so am not in a big hurry, I have about 9 months of warranty on the PF, none on the Amplifiers. Hopefully it was a bad cable, that and the PF were the common elements between the two amps. When I do test it again, your response will help me focus in on the causal element as best I can, which will be very helpful in determining what steps I would take should the problem manifests itself again.
Frank
