Gibson GA-5 // creative grounding 101

wow // strangest grounding I’ve ever seen maybe … main filter cap GND is going to tube rectifier socket, from there to power tube socket to provide GND for grid bias resistor and one side of filament circuit, thru filament leg to 12ax7 socket and to signal GND line to input jack ring lug and finally grounded THERE to the chassis … (LOL, re-did the whole scheme) … great sound going into my ’68 4×12 cab with 25w greenies // minimal hum …



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