PAGE 36
12AX7
V2
12AX7
V1
12AX7
V3
12AX7
V4
12AT7
V5
12AX7
V6
12AX7
V7
EL34
V9
EL34
V8
TRIPLE CROWN
™
TC-50
™
TUBE REPLACEMENT DIAGRAM
FRONT OF CHASSIS
PREAMP TUBES
POWER TUBES
V1A - CLEAN 1ST GAIN STAGE
V1B - CLEAN 2ND GAIN STAGE
V2A - CLEAN 3RD GAIN STAGE
V2B - N/A
V3A - HI/ LO 1ST GAIN STAGE
V3B - HI 2ND GAIN STAGE
V4A - HI 3RD GAIN STAGE / LO 2ND GAIN STAGE
V4B - HI 4TH GAIN STAGE / LO 3RD GAIN STAGE
50 Watts = V8, V9
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
6 x 12AX7 1 x 12AT7
4 X EL-34
V5A - FX LOOP SEND
V5B - FX LOOP RETURN
V6A - REVERB DRIVE
V6B - REVERB RETURN
V7A&B - DRIVER/PHASE INVERTER
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