[Elecraft] Re: K3 KRX3 - BNC or KAT3?

[Tom W8JI]

> There is only one AUX input physical connection on the 
> KRX3. At assembly, one must select which, if any, aux 
> input source will be used... either the non-tx KAT3 ant or 
> the separate BNC connector. That necessitates the 
> selection of Ant=bnc or Ant=Atu . When I installed the 
> KRX3, I physically installed both the BNC connector and 
> the KAT3 cables but did not connect either to the KRX3. 
> Maybe later...
>
> 73, Ken K3IU


I brought my RX antenna connections out on "RCA" phono 
jacks. Mainly I did this so the interface was a drop-in for 
my Yaesu and Icom rigs and the radios could easily be 
swapped.

I have the TX antenna available (when in receive mode) and 
both main and sub receiver inputs. This is a specialized 
application however where I have external antenna switches 
and might want to use multiple radios on one antenna. Or it 
lends itself to using a noise canceller with the TX antenna 
as a noise sample source, etc.

It's pretty easy to do this and it doesn't require cutting 
anything up. It can be undone without anyone knowing it was 
ever there. But again this is a special case where instant 
and full antenna flexibility is a must.

73 Tom