I'm not trying to make an aesthetic reproduction of a museum piece, so no pink wire and such (sorry). That's been done to death, so I wanted something different. I started with a Metro chassis, Marstran's iron (-80 PT, -132 OT, 3H), and some cues from Friedman's 12361 observations just to make it more interesting.
Notes and observations:
- Ch 2 is cascaded into Ch 1, a la 1959RR. I feel this would be more usable without the 5N bright cap on Ch 1.
- Now I remember why I never cared much for the 5N Ch1 bright cap. I might go smaller to make lower volumes more usable and less tinny.
- The PI filtering is a single 32uF. I tacked in an additional 16uF while playing (don't try this at home), but didn't notice any real difference.
- NFB is 100k and 4 ohm tap
- 330uF fat cap on V2. I have a 0.68UF on there as well so I can A/B.
- Sozo vintage caps
- amp can be rebiased without removing chassis
Comments, suggestions, questions, criticism, overlooked boo-boos all welcomed.
Sorry for the mediocre photo quality:







