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-1 assembled & tested MOSfet High Voltage Regulator, using MOSfet as regulator, using constant current source, B+ can adjust from 100 to 350V 200mA by change the two zener diode. Heater voltage reglator (LM317) selectable from 6.3V and 12.6V board size: 220mm X 62mm
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