[Elecraft] K3 on Order

[Tom W8JI]

> My concern for any Switching supply is the RFI noice that the radio will 
> pick up
> from the power supply. Looking at the SEC 1235m, I was reading that it has 
> a
> build in RFI filter. Plus I like the AD5X mod to slow down the fan. And 
> the
> Alinco DM-340 MVT has a knob to change the freq. of the noise that the 
> radio is
> picking up.

Any power supply that has a VFO knob built in means they either don't know 
how to get harmonics down to the proper level or don't want to spend a few 
bucks on components, so they took the cheap way out.

I have several switching supplies and can't hear any of them anywhere unless 
I run an antenna right in the room.