[Elecraft] K3 + K144XV question

[Don Wilhelm]

Jim,

The K144XV is natively a single antenna port transceiver.
But if you need separate TX and RX antenna connections for your 
transverter, note that there is a jumper setting that can apply +5V on 
the output coax during transmit - see page 21 of the K144XV instructions.
You should be able to use that voltage along with a small relay to 
change the K144XV antenna between your transverter's 144MHz TX and RX 
antenna connections.

73,
Don W3FPR

On 1/1/2018 2:18 PM, Jim Spears wrote:
> Happy New Year to all!
> 
>   
> 
> I have a K3 with the internal K144XV 2m module.  This works FB but both TX
> and RX are on the same antenna port.  In a configuration I am thinking of
> using, there would be separate RX and TX lines.
> 
>   
> 
> With my main 2m EME station which uses a second K3 and a 10m to 2m
> transverter, I have it configured with 28 MHz TX out on ANT2 to the
> transverter input port and 28 MHz RX in on the RX ANT IN port with the front
> panel .  This works FB.  I have the XVTR PWR menu setting such that it
> outputs 3 watts which is directed to ANT2 rather than the XVTR OUT port.
> Even though I am using a transverter, I am not using the back panel XVTR IN
> and OUT ports.
> 
>   
> 
> When I attach the output of a 144 MHz to 28 MHz downconverter RX line to the
> RX ANT IN port and enable  RX ANT function on the front panel, the K3 with
> internal K144 XV 2m module does not give me the desired results.
> 
>   
> 
> I hope I have made this clear.  It seems that this should work with the
> internal module since it works as I want with an external transverter.
>