In a message dated 9/23/2005 9:42:59 AM Central Standard Time,
tr3driver@comcast.net writes:
> I can't prove that none of them have only half-wave rectification, but I
> doubt
> it. Mine is certainly a cheap unit, and has full wave.
>
> > A single diode is less expensive than two (or four).
>
> That's true, but the heavier transformer required to achieve a particular
> current rating with only half wave rectification more than offsets the cost
> of
> one more diode. Diodes are pretty dang cheap, while the transformer is the
> most
> expensive item in the unit. Even $3 "wall warts" have full wave rectifiers.
>
May be so. The last one I took apart had half wave but it was old.
Dave
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