Bogner XTC 101b

[dtdionne]

Greetings,

I own this amp, it's out of warentee and my only goal is to work on it myself...In particular, I want to add the class A/AB Switch to it and possibly do the latest red channel mods. So my question is, if anyone out there a schematic for a Bogner XTC 101b and wouldnt mind sharing it another enthusiast, drop me a pm...

[FortinAmps]

Greetings,

I own this amp, it's out of warentee and my only goal is to work on it myself...In particular, I want to add the class A/AB Switch to it and possibly do the latest red channel mods. So my question is, if anyone out there a schematic for a Bogner XTC 101b and wouldnt mind sharing it another enthusiast, drop me a pm...

This schematic from Blue Guitar:
http://www.blueguitar.org/new/schem/bogner/

Open up the xtc.zip, the hand drawn ones are pretty dead on for the pre 2004 models. There were some slight changes hear and there but nothing major. You'll find the class a/ab stuff in there.
The Red Channel mod adds a .22uf cap in series with a 2.7k resistor strapped across the 3rd stage's 10k cathode resistor which I believe is R12. That will bring you up to current XTC specs. You can also verify this with Bogner directly. They have great customer service. :AOK

Cheers,
Mike