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] |
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] |
In reply to this post by Jim Spears
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] |
In reply to this post by Jim Spears
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] |
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