$2.00
A-13 bare board
serial regulator, output + and – 15V, 1A, with rectifier and filter capacitor board size: L 88mm X W 60mm
A-09 assembled & tested Shunt regulator, adjustable from 7V to 70V, current from 138mA to 430mA,double side gold plated PCB board size: L 120mm X W 90mm
GA-31B assembled & tested Output DC voltage: High 200V × 2 Filament 6.3V × 2 -15V × 1 -24V × 1 board size : 125mm×230mm
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
Tp-3 Bare board MOSFET power regulator board, using MOSFETas voltage regulator, tube rectify 6Z4,constant current source using resistor, Voltage adjust from 100V~350V. Heater Voltage regaltor ( LM317), voltage selectable from 6.3V to 12.6V board size: 220mm X 62mm
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