In an earlier post, I mentioned using a small inductor - such as some enameled wire wound on a plastic 35-mm film can - with a number of tap points to add inductance to the antenna. It goes in series with the "hot" side of the KX1 output. That will usually let you adjust the electrical length of the antenna to bring it within range of the ATU without having to go out and fiddle with the length of the radiator itself.
The KX1 ATU is more limited than the other Elecraft ATUs but it still has a very useful range. It's not necessary to be close to 50 ohms non-reactive for the KXAT1 to provide a good match. Ron AC7AC -----Original Message----- I've been following the 4-band antennas for KX-1 thread. Interesting and a real challenge for field operations. K2HYD's idea of a 51 foot antenna and counterpoise was helpful. Some additional thoughts- the ATU in the KX-1 is a little limited, as compared to other larger ATUs with more combinations, so we need antenna lengths which are relatively close to 50 ohms and nonreactive. The G5RV has already been done, but I am thinking of getting out my MFJ bridge thingie and trying flattop/feeder, or antenna/counterpoise length combinations (other than the G5RV) that will work well, and repeatably with the KX-1 internal ATU. Seems to me there have to be many flattop/feeder or antenna/counterpoise length combinations. 73 Jay W6CJ _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
