I used a weber 6a20 kit as a DR core for a custom amp design. There are lots of novel features, but the main ones are a redesign of the "Normal" channel that uses dual-cascode stages (with three 6922 tubes) for switched clean/fat tone, and a tone stack scoop-shift control that has 3 positions for different tone colors. This site has schematics, pics, discussion, and sound clips...
https://sites.google.com/site/string...me/deluxe-plus
Here is a pic of the final amp - showing the control panel changes. Maybe this will inject some new ideas into future amp builds.
https://sites.google.com/site/string...me/deluxe-plus
Here is a pic of the final amp - showing the control panel changes. Maybe this will inject some new ideas into future amp builds.