2022 integrated Edelweiss-3 High End Vacuum tube amplifier prototype is completed.

The new version is assisted class A1 Single Ended amplifier. Output power is 12W from 20 Hz. The same features as in 2019 version, including damping control by adjusting output impedance from minus 3.8 Ohm (servo damping) to plus 4 Ohm (current drive), for different designs of loudspeakers; output for headphones with attenuator, to adjust for any headphones from most sensitive dynamic to most power hungry planar; regulated voltage for zero hum and independence on mains voltage fluctuations, plus an input selector for 4 inputs. Also, optical limiter with overload indicator, bright red LED under the driver tube.
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