Hammond M-3 noise associated with percussion switches

[JesseW]

Hello Organ Forum,

First off thank everyone for their contributions, there is an endless amount of knowledge stored here. I have been reading...

I installled a used D tone card and now i have a hum when I press the key. starts on first octave, D plays fine but I can hear the buzz in the background....

[bcmatt]

After about 10 months of an emotional roller coaster, a friend/colleague/bandmate of mine acquired a B3 and 122. Up till now he has been using my M3 and...