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If you use SS diodes anywhere in the bridge, be sure to use either a snubber cap. or MOV, as protection against inductive kick back spikes. Think cLC filter, where c is 0.01 μF. and its WVDC is very large.
I parallel every diode with a 0.01u disc cap and 470K resistor (values not critical). This has been a standard commercial treatment for more than 50 years.
Buy Chinese. Bury freedom.
"I parallel every diode with a 0.01u disc cap and 470K resistor (values not critical)."
A very reasonable action, when most PN junction diodes are employed. FREDs can exhibit "funny" behavior, when snubbed. Snubbing diodes is unnecessary, when they are Schottkys.
The single snubber I mentioned is specifically for choke I/P filters associated with SS diodes. Without the cap. or MOV, inductive kick back spikes can destroy SS diodes. The situation is 1 where the electrical fragility of SS is illustrated.
Tubes are mechanically fragile and electrically robust. SS parts are mechanically robust and electrically fragile.
OK what's a MOV? and if I follow the LC section with another LC section is it really needed?
MOV = metal oxide varistor. They are what make surge suppressor power strips work.
Regardless of what you follow an I/P LC section with, inductive kick back spikes are a potential source of SS diode destruction. "An ounce of prevention is worth a pound of cure."
A link to a modestly price part that will get the job done is provided below.
I presume that each diode in the bridge is paralleled with one of these snubbing caps? Thanks for the link, much appreciated.
Only 1 snubber, connected between the bridge's O/P and ground, is needed. Remember, think cLC filter, where the 1st cap. is tiny .
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