DIY Do It Yourself KIT Headphones Hibryd 0fb Class A Tube Amplifier Using Boost Coverter Power Supply DC DC Coverter output 190Vdc 6.3Vdc starting from 12-24Vdc

Zero Feedback 100mW Hi Fi Tube - BJT Amplifer using Hi Voltage Power Supply by DC DC Boost Converter.

Boost and Buck Board provide to give:

VAS Tube Supply: 190Vdc
Curret Buffer Amplifer Supply: 30Vdc
Heater voltage 6.3Vdc by Step Down converter

All voltages obtained starting from 12-24Vdc power supply, as Desktop power supply or Battery

DC DC Step Up and Step Down Board