$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-11P bare board
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
GA-31B assembled & tested Output DC voltage: High 200V × 2 Filament 6.3V × 2 -15V × 1 -24V × 1 board size : 125mm×230mm
A-19 bare board output voltage adjust from 5V to 20V Max output curennt 5A (use a larger size heatsink) use LT1083 as volatge regulator board size:L110mm W60mm thickness 2.5mm
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