In Reply to: back in the saddle again...... posted by vinnie2 on August 10, 2015 at 17:13:59:
The only two places the two bread boards are connectred is through the shared B+ and through the RCA lines going from and to the 91a clone. Seems like it would almost have to be one of those, but darned if I know how. There is only a coupling cap separating the B+ from the input to the grid on each tube. Could signal be sneaking across from one channel to the other via the B+?
I hooked my 76 preamp back up to the 91a to double check, and it does not have the same problem.
Edits: 08/10/15
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- Just a thought...... - vinnie2 18:09:43 08/10/15 (0)