I have a K2, my first radio, that I've been operating for several months now. Just purchased a KXPA-100 with the KXAT100 internal auto tuner option, that I got working today, meaning that I got the keying circuit prototyped and working so the radio would key the amp. It seemed to work well and I was able to make a few contacts on FT8. My K2 has the KAT2 antenna tuner build in. I do not understand how the antenna tuner in the radio and the antenna tuner in the amp should interact. At first I had the KXAT100 in the amp in auto mode and it seemed to be tuning as I changed freqs. Then I tried the 'tune' button on the radio (sort of to see what would happen) and the antenna tuners in the radio and amp started tuning. My expectation was that the KXAT100 would present a fairly stable 50 ohm impedance to the radio and so the radio's tuner would not tune very much. I noticed that as I changed bands though, that 'tuning' on the radio caused both antenna tuners to change quite a lot (judging from the racket the relays in both radio and amp made). By the way, my antenna is a 66 ft. Carolina Windom 40m - 10m with about 150 ft of RG-213. Everything in the antenna/feed system is just a few months old and the SWRs on the K2/KAT2 have been 1.1 or 1.2.
So I'm wondering what might be the proper way to control the two antenna tuners in this setup as I change bands? 73 Steve, N6SAW ______________________________________________________________ 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]
