On Mon, 17 Nov 2003 01:04:39 GMT, Herbert West
wrote:

Damn cheap, poorly designed switching power supplies! I replace them
with analog supplies rated the same or higher current. Analog
float-chargers aren't that hard to build, either.

Yes, but they're often quite efficient. The problem is the
certification idiots. These manufacturers put just enough ferrite
material in these devices to meet the specification, but not enough to
be truly effective.

An easier and possibly cheaper solution might be to put ferrites on
the power cords going in and out of the charger. If it's a wall wart,
put the wall wart on a small outlet strip and put an RF block
(ferrites and three high voltage bypass capacitors) on the strip
before it goes in to your house.


Jake Brodsky, AB3A
"Beware of the massive impossible!"