Our friends at Revolver Amplification wrote:
“A customer sent me a Valve Jr. last week and it turned into a new project. He purchased a Valve Jr. kit from you guys. I fabricated a new point-to-point board for him and thought I should send you the results. I’m now offering this mod for the amp.” —Charles Prest, Revolver Amplification
Below are photos of Charles’ work, click on either to see a full-sized version (first stage upgrade).
And with 6V6 modification.
For more information please contact Revolver Amplification directly.
Source: https://mercurymagnetics.com/pages/catalog/kits/valvejr/Revolver/revolver1.htm
