Recently assembled a KPA500 / KAT500 pair and hooked ‘em up to my 2010 K3. I’m wondering what the capability of the KAT500 is versus that KAT3 internal K3 tuner, as far as what each will match.
I ask this because the KAT500 does a horrible job on 17 meter. The best if can do is about 2.3:1, whereas the K3 internal tuner has no difficulty getting a 1.0:1 match on the same antenna.
The antenna I use is an 88 foot long doublet 45 feet high. It is fed with about 110 feet of 600-ohm ladder line. At the shack end is a Balun Designs 4:1 balun, and from there to the back of the KAT500 is about ten feet of Belden 9913.
Is the KAT500 less capable of matching ugly SWR levels than the KAT3?
Jim / W6JHB
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