On 25 Mar 2014 at 13:53, Gary Smith wrote:
> My father's electric chair's charger went south. Its out of
> production and I haven't found an original charger. I bought a
> generic 24 DC charger on fleabay and it is the with rare exception
> the strongest signal on the band and it disrupts from 10 - 160
> (didn't try higher). Its amazing how loud this junk is on the air. I
> tried ferrite clamp-ons on the output & input with zero change in
> interference.
>
> An absolute POS.
>
> I need to find a 24V charger that is RFI friendly, a smart charger
> would be ideal. Anyone have a suggestion for one I can order?
Gary:
I know you probably don't want to hear this, but in my experience, rather than
beating your head against a wall trying to find one you can buy, you might
look for articles that have been published in QST and other sources on
building your own "smart charger". Those I remember were all linear,
non-switching, types which output no significant RF noise.
Ken W7EKB
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