Poindexter's "Machine" is a NICE 8 WPC piece and a line stage is not needed. However, the "Machine" has a B+, a B-, and a C- rail. That sort of PSU is an important part of a truly elegant unit.
I'm scoping out an 8 WPC amp at a less elegant level than Poinz's "Machine", but I SHAMELESSLY borrow some of his ideas. "El Cheapo" does not have a C- supply, as it uses cathode bias instead of adjustable fixed bias. The B+ and B- rails are present.
If the voltage of tube B+ supplies gives you pause for thought, maybe you should build a hybrid amp with "sand" finals and 6GM8 based voltage amplification. The 6GM8 is a low voltage relative of the 6DJ8 that works at rail voltages seen in SS gear. AMOF, 28 V. or so is as high as you can go on a 6GM8 plate.
Poindexter's Site
"El Cheapo" Project
I'm scoping out an 8 WPC amp at a less elegant level than Poinz's "Machine", but I SHAMELESSLY borrow some of his ideas. "El Cheapo" does not have a C- supply, as it uses cathode bias instead of adjustable fixed bias. The B+ and B- rails are present.
If the voltage of tube B+ supplies gives you pause for thought, maybe you should build a hybrid amp with "sand" finals and 6GM8 based voltage amplification. The 6GM8 is a low voltage relative of the 6DJ8 that works at rail voltages seen in SS gear. AMOF, 28 V. or so is as high as you can go on a 6GM8 plate.
Poindexter's Site
"El Cheapo" Project
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.