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Tube Amplifier for Headphone

Tube Amplifier 6N23P for Headphone.
I had several russian tubes 6N23P to build headphones amp. The original circuit was taken from here
One of the problem it was a high voltage power supply, because tube transformers is not cheap and hard to find now. So I decided to use voltage multiplier with mosfet filter for the anodes. The schematic is attached:
Tube Amplifier 6N23P for Headphone
The final look of my amp is:
Tube Amplifier 6N23P for Headphone

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