ORIGINAL MESSAGE:
On Sat, 07 Nov 2009 02:41:26 -0500, Roger <sub1@rogerhalstead.com> wrote:
>Why? It's DC. Wouldn't one diode should suffice? We used two of
>opposite polarity in parallel with AC at work.
REPLY:
A long time ago I thought that too - that one diode would be sufficient. But
then someone posted a bizarre scenario involving a broken ground wire and some
other condition (I forget the details) where reverse current could flow during
an arc. Since then I always use two diodes.
Cheap sleep-at-night insurance. :-)
73, Bill W6WRT
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