there's a bunch of free versions out there if you want to play, a popular one is LT-Spice/SwitcherCadIII (download from linear technology's website)

> Yeah, I'd have to throw in a whole new learning curve here if I went
> that route.
>
> Anything I should have in my "junk box" regularly?
>
> Someone a while back suggested I build a superhetrodyne receiver.
> Interesting idea.
>
> But you know, I'm in need of a power supply. :-) Particularly one for
> my amateur radio transceiver, which normally runs off of 13.8v DC. On
> recieve it only consumes 2A, on transmit for 100W output, it consumes
> 19A. It says the connector accepts 12 to 15vDC at 19A. Another page
> of the manual says it requires 13.5vDC up to 20A. It's protected by a
> 20A fuse. The output is through #12 wire. I'm gonna need a stable
> one that doesn't produce an output of a 60Hz (cycle) hum through the
> transmit. I had an old 12v CB Power brick supply which used to
> produce a AC hum when I transmitted.

Possibly a computer powersupply could be modified to lift the 12V rail by a few volts it'd have to be a fairly recent one though.

Bye. Jasen