Quote:
Originally Posted by Chris K
Bob…what diodes did you use to replace the selenium rectifiers? I would normally do this with 1N4007 diodes but I vaguely recall a suggestion, not necessarily from you, to use something else. When I spoke to Tim he believed the rectifier diodes I i installed were too big to be 007s.
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Due the general knowledge that a selenium rectifier is not as efficient as the replacement silicon diode, where the OEM selenium may drop anywhere between 5 and 20 Volts (or more) when new, and slowly increase as the part ages, a silicon diode has a drop of less than .6 Volts, give or take, resulting in substantially higher bias voltages, which need to be often adjusted for with a dropping resistor.
As for what kind of silicon diode to use, there is a large amount of flexibility as long as PIV & current needs are met, so as Timmy mentioned, the 1000v 3a ones used are pretty much bullet proof in such a set that hardly takes 1 amp.