MM>   The two "MP"s were likely 1N4001 diodes, each carrying a
successive
MM> half-wave of the 15V, for a low ripple output, and that
"extra" rating of "

 If they were 1N400X diodes, that's a pretty poor
design. 3 Amps would likely fry them early on, let
alone 5 Amp pulses. I guess that could explain his
current (pun intended) situation. I suspect that
they were rated for more than 1 Amp.

 I think I'd likely get a large bridge and just use
that to replace the diodes, or get those 6 Amp 50 V
diodes that RS has dirt cheap.

 TTYL.

 Robert

 * SLMR 2.1a * Marriage: A war in which you sleep with the enemy.
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