[Elecraft] KAT100 Problem

[Don Wilhelm]

Dick,

I figure you are using a multiband antenna.  It may be presenting a very 
low or very high impedance to the KAT100 on 20 meters.  The solution is 
to add or subtract about 1/8 wavelength of feedline to the antenna 
system.  On 20 meters, that would be about 8 feet of feedline.

Of course, that may transfer the problem to another band, but keep 
trying, you will eventually be able to get it to tune properly on all bands.

73,
Don W3FPR

On 7/7/2013 8:09 PM, richardjwiltgen at aol.com wrote:
> Don,
>
> Thanks for your prompt response.  Yes, I reduced everything to its bare minimum and tested it on a dry dummy load.  I am sorry; I should have stated that.  I also used about different jumper cables to connect to the dummy load, all yielding the same results on both 20 and 40. I also tested 10 and 80. It went off scale with much sooner on 10 meters as I progressed through the capacitors, but there didn't seem to be any dramatic change on 80.  The results with the dummy load almost precisely mirror those experienced with the antenna on 20 meters.  I was just using it with the antenna on 30 and 17 with excellent results.  It loads the antenna beautifully on all bands 10 through 160, with the exception of 20.  I will check the capacitors again on 30 meters later this evening.  Unfortunately, I do not have a capacity meter.  I am in Florida with the bare minimum of test equipment and scheduled to follow the snow birds north this week.  i'lllet you know what results I find on 30 me
>   ters.
>