A little background info-- my KAT100-1 is grounded, it is connected to a Carolina Windom 80. It will tune all bands from 80 through 10 meters and give a 1:1 SWR on all bands except for the phone band on 40 meters. If I go from the CW portion (7040 Khz for example) straight to the the phone segment, the K2/100 will click, the KAT ANTENNA LED and POWER RANGE LED will flash brightly momentarily and the KAT becomes unresponsive. The SWR is high when this happens, and VFO #2 reverts to VFO#1. If, however, I sneak up the frequency in approx 20 Khz increments and tune the KAT at each increment, I can tune the KAT all the way to 7300Khz with a 1:1 SWR. I have run all the L and C menu parameters, and all the relays click as they should. The parameters were checked starting on 10 meters and working down the bands. There were no components that showed a too large or small change in relation to the others tested. These were my readings on 40 meters: L0 1.0 L1 1.0 L2 1.1 L3 1.2 L4 1.7 L5 4.5 L6 9.9 L7 9.9 L8 9.9
C0 1.0 C1 1.0 C2 1.0 C3 1.0 C4 1.1 C5 1.3 C6 2.0 C7 5.0 C8 8.7 I am beginning to think that stray RF is created by the off-center fed antenna, and the KAT MCU becomes RF saturated and cannot tolerate it on the higher portion of 40 meters. If I tune the KAT into a 50 ohm dummy load, it seeks and attains a 1:1 SWR on all bands (including 40 meters). Any comments appreciated. Roy Morris W4WFB _______________________________________________ Elecraft mailing list Post to: [email protected] 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
