[Elecraft] OT Cat 7 Ethernet Cable

[Jim Brown]

Thanks, Brendon.  Hopefully the miniaturization offered by SMT reduces 
the size of the antennas that radiate any trash. :)  But that may be 
wishful thinking -- W6GJB encountered massive noise on HF that he 
tracked down to computer extension speakers with built-in power amps 
that were powered from a USB port. I suspect that this sort of circuit 
was used.

73, Jim K9YC

On Tue,3/8/2016 8:33 AM, Brendon Whateley wrote:
> Guys, surface mount switch mode power supplies run at up to 4MHz (and 
> much more) nowadays in pursuit of efficiency and small size. A lot of 
> digital circuits have them embedded on the board to convert voltages 
> for low voltage/high current chip cores.
>
> Here is the first design doc I could find: 
> http://www.digikey.com/en/articles/techzone/2015/feb/design-trade-offs-when-selecting-a-high-frequency-switching-regulator 
>
>