• 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.

Very simple high power single ended

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audiodesign

Banned
Joined 2005
see here

the new EL34 Parallel Single Ended - ver. 2

The project has some interesting features:

1) single ended design with medium-high power about 10w
2) class A1 operation to use the most linear area of output tubes
3) normal idle condition to have a long tube life time
4) Zout near to 1 ohm to have a good damping factor for a fast bass frequency on any kind of loudspeakers
5) simple design for any DIY with a low power supply voltage
6) it use only common tubes which are easy to find with most suppliers
 
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