Just completed my KAT1 for my K1 that I finished last night. All the tests seem to work properly, and I get a r1.0 (SWR of 1.0) on all 4 bands (7, 10, 14, & 21 MHz) when transmitting into a dummy load. However, when transmitting into my attic dipole the KAT1 can only achieve a match on 14 and 21 MHz (1.3 and 1.2 respectively). On 7 MHz I get r4.1 as best match, and on 10 MHz I get r3.2, both after much rattling of relays. My K2 (which I realize has a greater matching range) has no trouble with the same antenna setup.
The rigs are connected with about 2 ft. of RG58 to a 4:1 LDG balun, then to maybe 30-40 ft. of 450 ohm ladder line out into the attic where I have a 40m. 1/4 wave dipole with the center at the peak of the roof and the ends drooped down in random ways to fit the available space. When I adjusted C9, by the way, I got a null of about 0.06 mv. As I said, I've been through all the tests on the KAT1, including trying each L and C individually to make sure they are all working, and everything looks good. So I'm guessing I have to do something to the antenna to get make things work. Perhaps play with the length of ladder line? Any suggestions would be welcome. 73, Randy, KS4L _______________________________________________ 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
