P120Wiring20Diagram 电路图.pdf
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P120Wiring20Diagram 电路图.pdf
+ + + + 1 2 3 4 5 6 7 8 91 2 3 4 5 6 7 8 9 R12 C9 C10 R13 R14 R9 C5 C3 C2 C6 C8 R4 R3 R2 C1 C7C13 C12 R7 R16 R1 R10 R15 C11 R17 12AX76BQ5 R5 R6 VolumeTreble Mid Bass Power Amp Star Ground D1 D2 R18 R19 R8 To “Hot” tab of input jack Connect input jack ground tab to Preamp Star Ground X X X X X Speaker Jack - In the P1 it isnt necessary to have the speaker jack connecting to chassis ground. i.e. Plastic isolating washers are OK. - This will probably give you the lowest amount of noise. HT Center Tap (Red w/Yellow Stripe) Standby Switch Power Switch To Power Cord, Green Wire to separate chassis ground Note: If your PT has a center-tapped 6.3V winding and you choose to use the 100 ohm resistors, DO NOT ground the center tap.AX84 P1 Wiring Diagram Rev. 11 Drawing revised February 27, 2004 Drawn by Jim Jones http:/members.shaw.ca/house-of-jim Preamp Star Ground 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 tightly twisted together and soldered to pins 4 & 5 of the 6BQ5. Pins 4 & 5 of the 6BQ5 should be soldered to the eyelets holding R18 and R19 (marked by Xs.) XX RadioFans.CN 收音机爱 好者资料库
