PAGE 24
12AT7
V4
12AX7
V1
12AX7
V5
12AX7
V2
12AX7
V6
12AX7
V3
6V6
V7
6V6
V9
6V6
V10
6V6
V8
CALIFORNIA TWEED
™
4:FORTY
FRONT OF CHASSIS
PREAMP TUBES
V1A • INPUT STAGE
V1B • N/A
V2A/B • TONE CONTROL DRIVER
V3A • EFFECTS LOOP SEND
V3B • EFFECTS LOOP RETURN
BEFORE CHANGING TUBES FLIP POWER & STANDBY SWITCH TO OFF
INPUT JACK
TO MAINTAIN WARRANTY, USE MESA/BOOGIE
®
TUBES WHEN REPLACEMENT IS NECESSARY
FOR CUSTOMER SUPPORT, PLEASE CALL 707-778-6565 MONDAY-THURSDAY 9-5 PST, OR EMAIL US AT INFO@MESABOOGIE.COM
5 x 12AX7
1 x 12AT7
4 X 6V6
V4A/B • REVERB SEND STAGE
V5A/B • DRIVER/PHASE INVERTER
V6A • REVERB RETURN
V6B • REVERB MIXER
POWER TUBES
40W • V7-V10 PENTODE
30W • V9,V10 PENTODE
V7,V8 TRIODE
20W • V7,V8 PENTODE
10W • V7,V8 TRIODE
2W • V7 TRIODE
V9 PENTODE
TUBE REPLACEMENT DIAGRAM
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