[silent:arts]
Well-known member
Svart?
Svart said:The power supply looks like it will require a transformer with multiple windings, not easy for most folks to get unless you have a source for those too. I know it's too late for change suggestions however. I would suggest that people use schottky(or any soft/fast) rectifiers and not use the caps parallel with the diodes. Attempting to snub the diode snap will just shift it's power to a higher frequency making it harder to shield and more prone to leakage.
[silent:arts] said:any suggestions / links for your preferred rectifiers? I'm new to schottky.
Svart said:Schottkys are majority carriers so they have a much faster recovery and they have much lower forward voltage drops. Standard P-N junction diode's reverse recovery current when snapping off causes EMI(the reason for the capacitor shunts). Schottkys don't have this and are much more EMI quiet.
[silent:arts] said:out of interest:
we are talking about a linear PSU, 50 / 60 Hz frequency at the rectifier.
all I could find about Schottkys the last hour via google / wikipedia etc is they are good for switching PSUs at high frequencies ???
is there really an advantage in the schematic I posted?
Svart said:Lower frequency=more power generally.
Wasn't MUR860 the "one"?Tekay said:Audiofools are using schottky's like BYV27 in their psu's. It's all about spikes. 10nF in parallell with standard diodes will also lower the spikes. Don't use caps over the schottky's as it will be worse instead. BYV26E is a high voltage schottky.
Tekay said:BYV26E is a high voltage schottky.
mhm, wouldn't give enough space, and I can't reduce the trace width there.Kingston said:[silent:arts],
If you remove those useless (or even harmful) rectifier caps, there's easily room for those in the PCB. That would also allow the use of simple 1N400X or 1N540X alternatives for the less fussy folk.
thanks ;DChrioN said:[silent:arts]: I feel for you. This is not easy. Good luck!
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