[Elecraft] Re: K3 question re dual receive

[Ed Muns]

> >>> I plan to use my K3 primarily for low band dxing, so RX antenna
> switching will be crucial.
> 
> Actually I am a little confused as to how RX signals are 
> routed. The reason I ordered the KRX3 option was to get RX 
> antenna functionality. Basically I want to be able to have my 
> TX and RX antenna separated and have the choice to listen to 
> one or the other or both simultaneously.

The RX Antenna input comes with the KXV3 option, not the KRX3.

> Should I cancel the KRX3? <<<

Having the KRX3 in a K3 could be based on a lot of things.  But, if the
absolutely only reason you ordered it was to get the RX Antenna capability,
then what you need instead is the KXV3.

> I realize there was an error in my text, I am not questioning 
> my order of the second RX but I what I wonder is if the KXV3 
> transverter interface will bring anything to the table when 
> it comes to the second RX. I have not ordered the tuner as I 
> don't see any point to tuned on the radio end of the coax...

The KXV3's capability with the second receiver is still not fully defined.
What is defined is that the RX ANT input will be routed to both the main and
second receiver if the KRX3 is configured for "shared mode".  If the KRX3 is
in "auxiliary mode", then it uses the input connected to the KRX3 secondary
coax, normally the non-TX SO239 on the KAT3.  But, as Wayne has discussed
several times on this reflector, that KRX3 secondary coax could be connected
to another location, such as a BNC installed in the currently vacant AUX RF
position on the rear panel.  That would allow you to have a different RX
antenna on the second receiver than what is on the main receiver.  It would
also allow you to have a RX antenna on the second receiver, while the main
receiver uses the TX antenna for receive.  An example of what is not yet
determined in the KXV3 functionality is whether duplex TX/RX can be done
with the transverter input and output.

> My question is, how do I get the functionality I need as 
> described above.

I'm hesitant to say with certainty because there is a lot of information
missing from these emails.  But, I "think" all you need is the KXV3 option
if all you want is to have a separate RX antenna from your transmit antenna.
But, there are many uses of a second receiver, e.g., diversity reception
that has also been discussed on this reflector, and I can't tell from your
emails how the KRX3 would be useful to you.

73,
Ed - W0YK