5) TUBE COMPLIMENT AND BIAS ADJUSTMENT
From left to right:
V1 – 12AX7/ECC83 (stages 1 and 2)
V2 – 12AX7/ECC83 (stage 3 and tonestack cathode follower)
V3 – 12AX7/ECC83 (phase inverter for power amplifier)
V4 – 6V6
V5 – 6V6
BIAS ADJUSTMENT CONTROL IS INDICATED BY THE RED ARROW
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