Stable power supply has been obtained for free of charge and been checked inside on my personal curiosity. Three transistors were observed and three terminal semiconductors also. The bulk of transformer and the heat sink backward would supply at least 20A, though the out put voltage is not known.
Some indicator must be prepared on the surface, showing voltage and current, a rotary switch for various voltage also being planned on the frontal surface. This kind of electric DC power supply is convenient for me to arrange to any directions?
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