Power Supply +24V / -24V 3A for amplifier hifi
The main power supply is relatively conventional - the mains supply is presented to the torroidal transformer via a fuse, a thermal cut-out and the power switch. A device that looks like a VDR is mounted on the power switch…
The secondary windings produce ±24V nominally using discrete diodes and 2 reservoir capacitors. The second pair of capacitors is fed via 0.47 ohm resistors which reduce ripple by a good amount - I measured 0.8V pk-pk across C3 and 0.25V pk-pk across C4. A cheaper version of the choke PSU’s that MF use these days… Link
