• 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.

ZeroZone Tu1-EMP-V2

Guys,

Could you help to understand the attached schematic.

This is a chinese tube amp kit, according to the description the schematic based on Earmax. But I'm afraid, it's definitely not.
TU1-EMP V2 6922+12AT7 Tube headphone amplifier DIY Kit (Note no tubes) | eBay
According to the ebay item description the power supply is 18-0-18V AC, but the schematic shows 80V and 100V anode voltage.
Could you explain the working of the power supply part of the schematic?

Thanks
 

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