Disco Volante
Well-known member
Was gifted this 1975 piece of lab gear. I remember these quirky yellow things from electronics after-school activity.
It was rattling. One diode and two large caps had fallen off the PCB, several traces had just evaporated off the board.
A striking lack of security measures: no earth connector and no fuses whatsoever! No wonder the thing blew all four diodes and a small fifth one.
Couldn't be bothered tracing a schemo. All transistors checked ok, so replaced the caps and mounted a large bridge instead of the blown diodes.
Mounted a 3A fuse on the front. It has a relay that switches at around 6V, so apparently a low and a high regulator, one on each PCB.
Works great, a bit more ripple than expected, so maybe it needs a bit more C on the output...
It was rattling. One diode and two large caps had fallen off the PCB, several traces had just evaporated off the board.
A striking lack of security measures: no earth connector and no fuses whatsoever! No wonder the thing blew all four diodes and a small fifth one.
Couldn't be bothered tracing a schemo. All transistors checked ok, so replaced the caps and mounted a large bridge instead of the blown diodes.
Mounted a 3A fuse on the front. It has a relay that switches at around 6V, so apparently a low and a high regulator, one on each PCB.
Works great, a bit more ripple than expected, so maybe it needs a bit more C on the output...
