Bill, I have the same setup that you are inquiring about. The Cobra is full sized and I am using the full 100' of feed line. The balun is an Amidon W2FMI 4:1 unit mounted outdoors. I used a silicon sealant to weatherproof the enclosure. I usually use different antennas above 7 MHz, but will happily run some tests for you to let you know how well the K3's ATU handles matching chores on all bands.
Drop me an e-mail off list to let me know. 73, Joe - W1AIU K3/100 #269 _______________________________________________ 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