Cricklewood Electronics do 56R Carbon Film resistors in 2W types. I'm just assuming it's a 2W resistor. That's what it lists on the BOM for the PSU schematic that's available. However, the values and where they are placed do not match with what I've got in front of me on the PSU.exxos wrote: ↑Sun Dec 05, 2021 12:04 am I'm not sure about changing value and types without trying them out. I assume the ones you took out are carbon, you may have to chop it up to see. Going from carbon to wirewound , your adding inductance on a wire wound one, without studying the PSU with both types I don't recommend using wire wound, unless you can confirm they are already used.
BTW
If you run a incandescent lamp in series with the mains, say 40 or 60 watt , then it will act as a current limiter. Normally the lamp will light up like 50% if things are going well, if the PSU has failed, the lamp will go full brightness and gives you a few seconds to turn off before the PSU goes boom. I used to that with all the PSUs I serviced in my old job. Evil things they were. I also used to put a heavy catalog on top of it and turn it on across the workshop ! Did I mention those things were evil ?
The chared resistor I took out does still read at 54R on the multimeter and has also got continuity as well on either end.
Thanks,
Brett