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GRAY
REVERB
WHITE
TUBE TASK CHART
M
ARK I
V 5
NOTE: Before changing tubes, flip the POWER SWITCH to the off position or to STANDBY.
CAUTION: Tubes are HOT when they have been in use.
Partial View Of Chassis
(Each 12AX7 contains
two separate Triodes)
V 2
V 3
V 4
V 1
B A
B A
B A B A
REAR OF CHASSIS
( View from above - looking down on chassis )
6L6 6L6
6L6
6L6
12AX7
12AX7 12AX7
12AX7
B A
12AT7
V1 A = Input 1 - Stage 1
V1 B = Input 2 - Stage 1
V2 A = FX Return Stage
V2 B = Final Pre-Amp Stage
V3 A = Tone Control Recovery Amp
V3 B = Reverb Return Stage
V4 A =
V4 B =
V5 A =
V5 B =
Description of Tube Functions
Reverb Drive
Phase Inverter
PAGE 8