I
itsme
Well-known member
Can anyone provide the preamp tube positions/functions for a 101B? Used to be on the Bogner site, now I can't find it anywhere. Wonder why they'd hide it?
Death by Uberschall
Active member
V1A: 1st stage for Green channel
V1B: 1st stage for Blue and Red channel
V2A: 2nd stage for Blue and Red channel
V2B: 3rd stage for Red channel
V3A: 3rd stage for Blue channel and 4th stage for Red channel
V3B: cathode follower feeding the tonestack
V4A: cathode follower for FX Send (in circuit only if effects loop is on)
V4B: FX Return (in circuit only if effects loop is on)
V5A&B: Phase Inverter
V6A: 2nd stage for Green channel
V6B: 3rd stage for Green channel
V7-V9 & V8-V10: Power Amp tubes – 101B uses EL34, 101A uses 6L6, CLASSIC uses 6550 or EL34
PLEXI MODE: V1 and V3 only – V2 is not used
I
itsme
Well-known member
That's it. Wow. Thanks!