50V DC 3A Stabilized and Regulated Power Supply

This is the DC power supply that will give you 50V / 3A output, regulated and stabilized.

Components List:

R1=10Kohm	R8=1.8Kohm 0.5W	Q3=BC303 or BC461
R2=1 ohm 5W	R9=3.3Kohm 0.5W	D1….4=Bridge 15A
R3=3.9 ohms 1W	RV1=470 ohms pot.	D5=LED RED 5mm
R4=6.8Kohm 1W	C1-2-4=4700uF 100V	D6-7=10V 1W Zener
R5=390 ohms 1W	C3-5=100nF 250V MKT	D8-9-10=1N4007
R6=100Kohm 0.5W	Q1=2N3055 on heatsink	T1=230Vac / 55V 3A
R7=1.2Kohm 1W	Q2=BD162 or BD243 or BD543

There some times that we need a stabilized , together regulated power supply and relatively high voltage . These specifications cover our circuit. It is a power supply circuit that can give output of +40 V to +60 V 3A, with simultaneous stabilization materials used are very simple and there will be difficulties in manufacturing, it is sufficient to look for certain signs.

For smaller output voltages of +50 V to the +40 V, the Q1 is hot enough, so that it needs a large heatsink.
For voltages greater than the +50 V to +70 V, the stabilization is not satisfactory.

Conclusion: ideal output voltage +45 V to +60 V. In circuit diagram, the variable resistor / potensiometer of RV1, is used to vary the output voltage between +40 V to +70 V, but maybe we should replace it with two fixed resistors, when finished setting the desired value. The reason is that with the time change occurs output voltage up to 3V with connected potensiometer.

CAUTION ! The positive output corresponds to the point [ A] and the output of 0V, in [ B], which must not be connected to ground .

psu