Quote:
Originally Posted by ljguitar
Hi jdw...
Get a ground lifting plug adapter (under a buck at the local box store) which converts three to two pins and it should take care of it. It is the wiring (or something else on the same circuit as the amp) causing the grounding 60 cycle hum.
I carry them with all my amp/gear and have for over 30 years. Life saver…
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That ground plug is there as a safety in case a wire shorts out in your amp. When you remove it from the circuit you take the risk of shocking or electrocuting yourself.
By using the adaptor you lose the hum, but there is some risk involved.