6L6 or EL34
RECTIFIER TUBES
12AX7
(5)
V 5
V 4 V 3
V 2
V 1
PARTIAL VIEW OF CHASSIS
BACK EDGE OF CHASSIS
DUAL RECTIFIER
TUBE TASK CHART
B A
B A
B A
B A B A
(Each 12AX7 contains two separate Triodes)
5U4G
V1 A= Input Stage all 3 Channels
V1 B= Clean Channel
V2 A= 2nd Input Stage all Channels
V2 B=Channels 2 & 3 Boost Stage
V3 A=Channels 2 & 3 Boost Stage
V3 B= Same as V3 A
V4 A= FX Send
V4 B= FX Return
V5 A=
V5 B=
Phase Splitter /
Output
Description of Tube Functions