[Elecraft] Switching power supply designs

[Karl Larsen]

Stephen Okolita wrote:
> Hi folks,
>
> I want to build a switching power supply for my K2/100
> and KAT100 (so, 20+ amps) however I've had trouble
> finding a decent switching power supply design that
> uses all off-the-shelf components.  I know that
> there's a design in the ARRL handbook but I'm not
> crazy about cooking up (literally) the custom power
> transformer that particular design calls for.  There
> also doesn't seem to be much on the internet either. 
> So I'm wondering if any of you folks have come across
> a design that would fit the bill.
>
>   
    Hi Stephen, I thought about building a 25 amp 13.8 volt switcher and 
then heard about all the noisy ones you could buy then. Two years ago I 
read the ad for the MFJ-4125 switcher for $100.00 and bought one. It is 
totally RF noise free and has a pair of quiet fans to cool off the 
parts. You can hear the fans.

     I am very happy with mine.

73 Karl K5DI

> Stephen
>