Here is a really great explanation of how these little amps work:
This guy is more concerned with the visual aesthetics of the caps than the actual function. He never even checked the Sangamos, or the bias resistor. While the amp certainly works, is it really 'vintage tone' or 'worn-out tone'?
Danelectro is my favorite type of guitar, simply for the genius of their unorthodox, inexpensive, yet highly effective designs. I love the tone of old-growth masonite. If you are looking for details, the Pro-1 Bass is the most complete build documentation.
More: Danelectro Projects ...
The two Kubicki bodies finally have all the bursted edges done. This is a dark brown, not a black, that looks very nice with the yellow of the pine, as you can see here on the Strato-vox:
More: Bursts Done ...