TYPICAL CLASS B AUDIO-FREQUENCY AMPLIFIER

OUTPUT 20 WATTS

C1 = 0.1μf.
C2 = 0.25μf.
C3 = 1.0μf.
C4 = 8.0μf.(LOW VOLTAGE)
C5 = 0.06μf.
C6 = 16μf.(ELECTROLYTIC)
C7 = 8μf.(ELECTROLYTIC)
R1 = 250000 OHMS(VOL.CONTROL)
R2 = 7000 OHMS
R3 = 100000 OHMS
R4 = 25000 OHMS
R5 = 250000 OHMS
R6 = 1100 OHMS
R7 = 25000 OHMS
R8 = 3500 OHMS
R9 = 3200 OHMS(10 WATT)

T1 = INPUT TRANSFORMER; PRIMARY TO 1/2 SECONDARY = 3:1 PRIMARY INDUCTANCE = 12H. AT 26MA.
T2 = OUTPUT TRANSFORMER; 6000 OHMS PLATE-TO-PLATE
T3 = POWER TRANSFORMER; SHOULD HAVE GOOD VOLTAGE REGULATION CHARACTERISTICS
L1 = 15 HENRIES AT 100 MA; 80 OHMS D-C RESISTANCE, OR LESS
L2 = 1500 OHM SPEAKER FIELD, 115 VOLTS
L2 = 2500 OHM SPEAKER FIELD, 125 VOLTS

NOTE:SPEAKERS ESPECIALLY DESIGNED FOR HIGH POWER ARE RECOMMENDED.CIRCUIT CONSTANTS SHOULD CLOSELY APPROXIMATE THOSE GIVEN ABOVE FOR SATISFACTORY RESULTS.

<Taken from RC11 Tube Manual>