This is an assembled kit of a tube amplifier power supply regulation circuit with soft starting. The board features tube rectification ,power-on soft starting and low ripple dc regulation using heavy duty MOSFET.
The board consists of two sets of individual circuit in a monobloc arrangement for maximum channel separation of a stereo amplifier.
The high tension section is composed of tube rectification( which also serves soft starting purpose) and series regulation by zener diodes and MOSFETs. The default output is 255V dc +/- 5% at no load condition. This voltage can be altered by changing the zener diodes.
Each of the two individual filament supply circuits can provide up to 1.5A of filament current, 6V dc.
The rectifier tubes are China-made Shuguang 6Z4 type, new and fully verified on our TV-7/U tube tester.
The board requires AC 240V and 6.3V input.
Board size: 168mm x120mm.
