> Can you explain to me the use of fast recovery diodes if you are going > to put capacitors across them?
I can see using fast-recovery diodes if you want to rectify the output of a switching supply, to limit the losses. Ordinary 1N400x diodes start to run very hot above a few kHz. In a switcher, it would be reasonable to use fast-recovery diodes with capacitors to control both EMI and loss. But yeah, it's hard to see the point in a 50/60-Hz supply. Schottkys have less forward voltage drop, I guess, so maybe the idea is to use smaller diodes/heat sinks for a given supply current. -- john, KE5FX _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.