[Elecraft] KPA100

[Mark J. Dulcey]

Bob Hightower wrote:
> Decision time. Having just about completed the build of the KPA100, I need
> to decide if I want to include it in the K2, or make it an outboard amp.
> 
> I recall a note with a URL on how to build it into the Elecraft enclosure,
> but as I had to reformat my computer, that one went down the drain. Anyone
> remember that one?
> 
> Also, I'd welcome pros and cons on doing this. I hate to change the original
> configuration, but want the amp for when I decide to go QRO. Would using an
> outboard amp be easier to switch back and forth, or not?

Moving the amplifier into an EC2 is simple enough to do. You have to 
make one small modification to the KPA100 (adding a 200-300  ohm 
resistor), but it doesn't preclude putting the amp back in the K2 if you 
want to.

I chose to separate mine, because I wanted to keep the K2 ready for QRP 
field operation. It's certainly easier to switch back and forth between 
the QRP and QRO configurations with the separates, because you don't 
have to open the box; just unplug the RF and serial cables, and you're 
ready to go. The operating integration is also unchanged; the amp and K2 
in separate boxes work just as smoothly as if they were in the same box.