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Old 16th September 2005, 10:53 PM   #1
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Join Date: Apr 2004
Location: U.S.A.
Default super simple tube amp needed...


I recently got my first taste of tube amp goodness...

Now i'd like to build something small , around 8+ watts per channel.

I don't want to have a very complicated power supply as i'm a bit of a wuss when it comes to playing with mains

Does what i'm asking for exist?

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Old 17th September 2005, 12:00 AM   #2
Bare is offline Bare  Canada
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Old 17th September 2005, 12:04 AM   #3
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Location: Monroe Township, NJ
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
Eli D.
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