K3 + K144XV question

[Jim Spears]

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.

 

Ideas or suggestions?

 

Jim

N1NK

 

 

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[Ken Arck]

I believe the internal xvrtr routes the rcv antenna connection
through a header on the board and in normal operation, that is
jumpered. I would think you can remove the jumper and use the header
to make your receive connection

Ken


At 11:18 AM 1/1/2018, 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.
>
>
>
>Ideas or suggestions?
>
>
>
>Jim
>
>N1NK
>
>
>
>
>
>______________________________________________________________
>Elecraft mailing list
>Home: http://mailman.qth.net/mailman/listinfo/elecraft
>Help: http://mailman.qth.net/mmfaq.htm
>Post: mailto:[hidden email]
>
>This list hosted by: http://www.qsl.net
>Please help support this email list: http://www.qsl.net/donate.html
>Message delivered to [hidden email]

------------------------------------------------------------------------------
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
Authorized Dealers for Kenwood and Telewave and
we offer complete repeater packages!
AH6LE/R - IRLP Node 3000
http://www.irlp.net
"We don't just make 'em. We use 'em!"

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[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.
>

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[Dave-3]

I wrote up how I separated the transmit and receive 2m paths  at:-
https://g4fre.blogspot.co.uk/2014/12/seperate-receive-and-transmit-paths-for
.html

I also wrote up how I got a range of output power from the K144XV suitable
for my microwave external Transverters at

https://g4fre.blogspot.co.uk/2017/12/making-k3-internal-transverter-more.htm
l

Dave
G4FRE

------------------------------

Message: 13
Date: Mon, 1 Jan 2018 14:18:36 -0500
From: "Jim Spears" <[hidden email]>
To: <[hidden email]>
Subject: [Elecraft] K3 + K144XV question
Message-ID: <038301d38335$52c47b30$f84d7190$@cox.net>
Content-Type: text/plain; charset="us-ascii"

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.  

Ideas or suggestions?
Jim
N1NK


Message: 14
Date: Mon, 01 Jan 2018 11:26:28 -0800
From: Ken Arck <[hidden email]>
To: "Jim Spears" <[hidden email]>,<[hidden email]>
Subject: Re: [Elecraft] K3 + K144XV question
Message-ID: <[hidden email]>
Content-Type: text/plain; charset="us-ascii"; format=flowed

I believe the internal xvrtr routes the rcv antenna connection
through a header on the board and in normal operation, that is
jumpered. I would think you can remove the jumper and use the header
to make your receive connection

Ken


______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]