Mesa/Boogie Mark Five - Mark V Tube Replacement Guide; Tube Replacement Safety Precautions

V11V9V8V10
4 x 6L6
Matched
Pair 2
Matched Pair 1
V1A-- Input Stage V1B-- 2nd Gain stage CH1/CH3, 3rd Gain Stage CH2 V2A-- 2nd Gain Stage CH2 V2B-- n/a V3A-- 3rd Gain Stage CH1/CH3, 4th Gain Stage CH2 V3B-- 4th Gain Stage CH1
V4A-- Reverb Send V4B-- 2nd Drive stage CH3 V5A-- 1st Drive stage CH3 V5B-- Reverb return V6A-- 4th Gain stage CH3 V6B-- Effects return stage V7A&B-- Driver/Phase inverter
Preamp Tubes
90 Watts = V8, V9, V10, V11 45 Watts = V8, V9 10 Watts = V8, V10
Power Tubes
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