Or 8 x MR750 (MR7510) diodes (MR750 = 6 Ampere diode) or 16 x 1N5401 (1N5408) diodes.Ĭ2 four times 4700uF/50v or one 22000uF/50vĪfter many years of employing this ugly and clumsy bench power supply, I decided it was time to build something better, smaller and nice looking. Or eight BYW29 8 amp diodes (TO220 pinning cooled) Remember to isolate the 2N3055 transistors from the chassis/radiator! Use a radiator (heat sink) of appropriate size and surface area insulating and heat-conducting spacer or at least a thin mica hot adhesive and thermal paste.ĭ1.D4= Bridge rectifier MB2504 (25 amps cooled) Or you could use eight BYW29 8 amp diodes (TO220 pinning) mounted on a heat sink. So no delay do to the discharge of C2, and so preventing output voltages from not return to zero immediately.Ī MB2504 is used as it is a 25 ampere rectifier bridge which also should be cooled. The relay is used to switch off the power supply voltage when the mains (S1) are/is switched off. S2 switches between +- 3 Amps and full output current
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