. Various P120Wiring20Diagram free download

File name P120Wiring20Diagram.pdf

Heater Wiring: Solder one wire to pins 4 and 5 of the 12AX7, another wire to pin 9 of the 12AX7. Those wires should be Speaker Jack tightly twisted together and soldered to pins 4 & 5 - In the P1 it isn't necessary to have the of the 6BQ5. Pins 4 & 5 of the 6BQ5 should be soldered speaker jack connecting to chassis ground. to the eyelets holding R18 and R19 (marked by X's.) i.e. Plastic isolating washers are OK. 12AX7 6BQ5 - This will probably give you the lowest amount of noise. Connect input jack X X X X 5 5 4 6 4 6 ground tab to 3 7 3 7 Preamp Star Ground 2 8 2 8 1 9 1 9 R8 X Power Switch R6 To "Hot" tab of R5 input jack To Power