ZeroZone Tu1-EMP-V2

[gaszto]

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

 

[showdown]

There's a voltage doubler in there. You could theoretically reach 90-100V then, if you used both windings (36V end to end). I'm not qualified to say anything good or bad about the circuit, though 🙂

 

[gaszto]

Thanks for the explanation. I googled voltage doubler circuit, now I understand what's going on 🙂

Thanks