[Elecraft] K3 Sub RX Not Working
Dave: I've had a K3s without the subreceiver for years. When I pushed the "Sub" button, "No Sub" appeared in the display just like you described. A few months ago, I bought the subreceiver and installed it. When I first turned the K3s on, the same "No sub" message appeared. I then updated the firmware. Once I did that, the K3s recognized the subreceiver, and all is well now. It works fine and is a valuable tool in DX pileups. I have four possibilities for your issue: 1) Are you sure the subreceiver is actually installed? Opening up the top of the rig would let you know quickly because the subreceiver comes in a metal case that sits on top of the main RF board. If, when you open up the top of your K3, you can see the crystal filters on the RF board, then that means you do NOT have a subreceiver, since the subreceiver would be on top. That would explain the "No sub" message. 2) Another possibility is that you haven't updated your firmware like I have. Don't ask me why that made the K3s recognize the presence of the subreceiver, but it did. 3) When I was installing the subreceiver, I also had to install a second KSYN3 board. This is the synthesizer used by each receiver. One KSYN3 board won't work for both receivers. Additionally, there is an old version and a new version of the KSYN3 boards. Since I had the K3s, my radio had the newer version, and I got the newer version of the KSYN3 board. I don't know if it is important for the KSYN3 boards used by each receiver to match, but that would make sense and it worked for me. 4) There are the TMP cables (little coaxial cables internal the K3s and I assume to the K3) that run from the KSYN3 boards to the subreceivers and to the radio itself. Opening the top of the K3 would allow you to check to make sure one of these cables hasn't come loose. One of those coming loose would account for the fact that your K3 doesn't recognize the presence of the subreceiver. I hope this is of some help. 73 de Bernie, KF0QS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 Sub RX Not Working
As Rick said; Go into config MENU KRX3, set it to BNC or ATU depending on how the rear antenna coax is cabled, then exit the menu and cycle power. Keith WE6R K3 / K4 Tech __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 Sub RX Not Working
Check the menu setting? Not Inst? 73, Rick nk7i On 4/17/2024 8:39 PM, Robie Elms wrote: Dave, Mark sure you do not have the AUX antenna selected for your sub receiver. Push and Hold the RX ANT button and change it from Main to AUX or vice versa. This selection is band sensitive. Robie AJ4F On Wed, Apr 17, 2024 at 10:07 PM H D Barr wrote: My K3 (non-S) is equipped with the second rx, which I rarely use. After infrequent use (got a K4) the sub rx seems to have stopped functioning; no signal or noise can be heard from it. When the "Sub" button is tapped, "No Sub" appears in the display. The main rx and tx functions seem normal. Before I open up the K3 to see if any cables have come loose, I am searching for more obvious (or easier to check) possible reasons, including operator error. Any ideas are welcome. Thanks and 73. Dave, K2YG __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to rule...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to rick.n...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 Sub RX Not Working
Dave, Mark sure you do not have the AUX antenna selected for your sub receiver. Push and Hold the RX ANT button and change it from Main to AUX or vice versa. This selection is band sensitive. Robie AJ4F On Wed, Apr 17, 2024 at 10:07 PM H D Barr wrote: > My K3 (non-S) is equipped with the second rx, which I rarely use. After > infrequent use (got a K4) the sub rx seems to have stopped functioning; > no signal or noise can be heard from it. When the "Sub" button is > tapped, "No Sub" appears in the display. The main rx and tx functions > seem normal. Before I open up the K3 to see if any cables have come > loose, I am searching for more obvious (or easier to check) possible > reasons, including operator error. Any ideas are welcome. > > Thanks and 73. > > Dave, K2YG > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to rule...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3 Sub RX Not Working
My K3 (non-S) is equipped with the second rx, which I rarely use. After infrequent use (got a K4) the sub rx seems to have stopped functioning; no signal or noise can be heard from it. When the "Sub" button is tapped, "No Sub" appears in the display. The main rx and tx functions seem normal. Before I open up the K3 to see if any cables have come loose, I am searching for more obvious (or easier to check) possible reasons, including operator error. Any ideas are welcome. Thanks and 73. Dave, K2YG __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
