St_george 电路图 维修原理图.pdf

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1、5 5 4 4 3 3 2 2 1 1 DD CC BB AA BLUE BROWN SOURCE RED B+ B+ B+ Title SizeDocument NumberRev Date:Sheetof KD Nickels 1 St George Tube Amp B 11Friday, September 19, 2008 VOLUME LOW ST. GEORGE HI ON OFF 12 INSTRUMENTS 21 C1 R7 SW1 THE CHASSIS SYMBOL IS THE CIRCUIT COMMON SYMBOL IS NOTES: TUBE U1 CAN BE

2、 EITHER A 12AT6 OR A 12AV6 THE GAIN VALUE FOR THE 12AT6 IS 70 THE GAIN VALUE FOR THE 12AV6 IS 100 THE HEATER CURCUIT CARRIES 150 mA THE CHASSIS FLOATS AT ABOUT 40 VAC, WITH LESS THAN 1.2 mA LEAKAGE. C6 R7 TS1 R4 R6 100K 1 7 J3 35W4 LS1 SPEAKER J1 1 2 R7 1.2M 5 W R7 100K U112AV6 7 2 3 4 6 5 1 C3 40uF 150 V 1 7 J1 12AV6C2 J3 PLUG AC MALE J2 INSTRUMENTS 1 2 C4 1 7 J2 50C5 LS1 SPEAKER U335W4 5 3 4 7 6 1 2 U250C5 7 1 3 4 2 6 5 R2 R1 120K J3 PLUG AC MALE POWER C5 40uF 150 V C6 033uF 600 V R6 R3 1.2M C3 R3 T1 C5 C1 .005uF R1 R5 1M R2 330K R4 3.6K C2 .001uF C4 25uF 25 V 收音机爱好者资料库 Ra d i o Fa n s .CN