A-11P bare board
TP-3 assembled & tested MOSFET power regulator board, using MOSFETas voltage regulator, tube rectify 6Z4,constant current source using resistor, Voltage adjust from 100V~350V. Heater Voltage regulator (LM317) selectable from 6.3V and 12.6V board size: 220mm X 62mm (tube 6Z4 not included)
TP-2 bare board MOSFET power regulator board, same as TP-1 but constant current source using resistor instead of MosFet, Voltage adjust from 100V~350V by changing two zener diode, current output 200mA. Heater voltage selectable from 6.3V and 12.6V. board size: 220mm X 62mm
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