RE: KAT100 Alive and Healthy!
Posted by
Don Wilhelm-3 on
Jun 10, 2006; 3:51pm
URL: http://elecraft.85.s1.nabble.com/KAT100-Alive-and-Healthy-tp390757p390758.html
Roy,
That goes to prove once again that "my feedline tunes may antenna" due to
the transformer effects of the feedline length.
The major problem with a multi-band antenna is finding a feedline length
that provides an adequate match for the tuner on all bands - but I wonder
just how high the SWR is on the RG-8X and how much signal is getting lost in
that feedline.
73,
Don W3FPR
> -----Original Message-----
> Earlier I had stated my KAT100-1 was displaying random SWR LEDs
> on 30 meters. My antenna is a Carolina Windom 80 with
> approximately 70 feet of RG8X coming off the bottom of the lower
> balun to the shack. (There is an additional 22 feet from lower
> balun to the off-set center conductor.) A light bulb turned on
> in my head and told me to try some extra length of coax on the
> feed line. I added an extra 4 1/2 feet which the KAT100-1 really
> liked. Now it tunes 1:1 SWR on all bands and the KAT100-1 works
> to perfection (only the leftmost green LED lights up). The Bird
> 43 wattmeter between the KPA100 output and KAT100-1 input
> verifies this. Sometimes a simple solution is right under your
> nose. Roy Morris W4WFB
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