• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

super simple tube amp needed...

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Hello!

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:att'n:

Does what i'm asking for exist?

Thanks!
 
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
 
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