Bogner Ecstasy Classic Tube Layout

[joafink2]

Anybody have the tube layout for this amp?

I have one that’s killer sounding. But the clean channel is having volume swells. Thinking it’s a bad preamp tube. Anyone know which preamp tube (or tubes) are correlated with the clean channel?

 

[101B /^/]

See pics for tube layout from the online xtc manual (2004). Technically the manual's for the 101B but I’m guessing tube layout is the same.