A-09 bare board

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  TP-2 bare board

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  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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  A-09 assembled & tested

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  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

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  A-15D bare board

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  A-15D bare board Serial regulator low output impedance and ripple current, adjustable from ±5~±60V. board size: L 120mm X W 75MM

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  LS-56 assembled & tested

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  LS-56 assembled & tested Transistor regular power supply.each channel using two TIP50 one LM317, two channel seperate B+ voltage adjustable from 210V-400V, two heater output using metal two LM317K,heater voltage from 6.3V to 12.6V board size: L 230mm X W 155mm. 2.4mm fibre glass board with thicker copper trace

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