Pre/post 2004 XTC 101B mod pictures or tutorial

[Lublin]

Anyone have any pictures or how to info on doing the pre/post 2004 XTC 101B mod? I've searched the topic, have found threads, but no photos ever show up.

Thanks in advance!

 

[Setneck]

The easiest way is to implement Marvel Mod. You can read about it here: http://bognerampforum.informe.com/viewtopic.php?t=1225

And it looks like this:

If You want manually add components to Your circuit here's a tutorial:
http://bognerampforum.informe.com/red-c ... dt967.html

Regards, Andy

 

[vintagemusicgear]

Wow, thanks for that. Very informative.

 

[RSRD]

Andy is the man!

 

[vintagemusicgear]

Makes me want to get an XTC....

 

[vintagemusicgear]

What is the difference between the pre and post 2004 gain structures?

 

[Setneck]

Pre2004 amp has plain 10K 4th stage cathode resistor. Cleaner, more transparent sound. In post2004 amp this resistor is bypassed by 0.22uF cap in series with 2.7K resistor. That combo gives a gain kick in upper mids and highs, but compresses the tone quite much. That mod affects Red Channel only.

Regards, Andy