$2.00
A-13 bare board
serial regulator, output + and – 15V, 1A, with rectifier and filter capacitor board size: L 88mm X W 60mm
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
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
A-15D assembled & tested Serial regulator low output impedance and ripple current, adjustable from ±5~±60V. board size: L 120mm X W 75MM
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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