wrote in message
...
On Friday, February 5, 2016 at 7:02:41 AM UTC-5, Mark Zacharias wrote:
If it is a polarity problem, it could be in the outlet that the amp
is plugged into at home.



Just yesterday had a hum problem caused by the infamous "yellow glue
turned
brown"

The glue was apparently conductive enough to couple to a signal lead
right
at the edge of the goop.

Strangely, the hum was 60 hz instead of 120. Still haven't figured out
that
part.


Mark Z.

If the glue became conductive - then it would be due to a chemical salt
within its composition. Many salts, by nature are diodes - so it would
rectify only half the wave-form - 60 hz.

Just a random thought.

Peter Wieck
Melrose Park, PA


I did wonder about that but it seemed a bit much. There was also an
important but not necassarily the same circuit ground in the affected area.
Possibly that coupled over somehow.

mz