A-09 bare board
Shunt regulator, adjustable from 7V to 70V, current from 138mA to 430mA,double side gold plated PCB
board size: L 120mm X W 90mm
A-09 bare board
Shunt regulator, adjustable from 7V to 70V, current from 138mA to 430mA,double side gold plated PCB
board size: L 120mm X W 90mm
LS-56 bare board 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
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)
A-08 assembled & tested Shunt regulator, adjustable from 4V to 40V ,current from 125~250mA, specially for replace the orignal power supply of CD player, pre-amp, DAC, LM317 as current limit. Using K703 as the loading device to reduce the output impedance, have short circuit protection board size: L 80mm X W 72mm
TP-2 assembled & tested 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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