I am using the K2/100 KAT100 combination into a Carolina Windom 80. It works well on all bands (excluding 160). On 30 meters the KAT100 SWR seems to occasionally fluctuate wildly as indicated by the LEDs. The leftmost LED is always (stays) lit with power applied even during the fluctuations. A Bird 43 wattmeter with 250H slug is in line between the KPA100 output and the KAT100 input. At no time while the LEDs were fluctuating did the SWR on the wattmeter go off zero. I chalk this up to stray RF in the KAT100 even though it is grounded. I receive good clean RST reports on 30 meters at all power levels. When the KAT100 LEDs are erratic, it doesn't always mean SWR trouble. It may mean stray RF though. Grounding the KAT100 (and K2) and sanding the panels at block joints may or may not help. You just live with it or put up another antenna. Roy Morris W4WFB
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