Andy ... I can't speak to Kenwood interfacing, but I can report that my BigIR flawlessly follows my K4 as I tune. My SDA100 is sn12753, which I acquired along with the BigIR in August of 2022. My connection is the simple RS232 to RS232 cable, controller to radio.
73 Dick, K5AND -----Original Message----- From: [email protected] <[email protected]> On Behalf Of Andy Durbin Sent: Saturday, March 15, 2025 8:36 AM To: [email protected] Subject: [Elecraft] Connecting a BigIR "My question is exactly where to connect the SteppIR control box to the radio." The simple answer is do not connect that way. The direct SteppIR interface with a Kenwood/Elecraft rig is very poorly implemented and may cause the SteppIR to tune at beginning and end of transmission. Far better to use a separate application or hardware interface that sends the SteppIR controller only the TX frequency. I have been using PstRotatorAz for many years. Others have used DXLab Commander secondary port. My experience is with a 2 element SteppIR but the tune on TX problem will be just the same with a BigIR. I wrote a paper on this issue about 10 years ago but, to the best of my knowledge, SteppIR did not fix it in any later controller versions or models. https://tinyurl.com/m9ms6jh8 Andy, k3wyc ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
