[Elecraft] KAT100 or KAP100 problem

[Phil Wheeler]

Douglas Westover wrote:

>After several months of flawless operation the KPA/KAT
>pair seems to have developed a problem. It only occurs
>on 30 meters and manifests itself by the inability to tune
>the 30 meter antenna at the high power (20 watt tune level).
>Dropping to low power it tunes properly as before. When
>it fails to tune I get a "High Reflected Power" warning and
>the output power as read on an external wattmeter goes
>absolutely crazy as if the amplifier has gone unstable.
>However if I substitute a 50 ohm dummy load it behaves
>properly at any power level.
>
>Again this only happens on 30 meters and there have been
>no changes in the antenna.
>  
>

What is the antenna, Doug?  Hard to speculate without knowing :)

73, Phil