[Elecraft] K2/100 and KAT100 odd behavior

[VR2BrettGraham]

EI6IZ replied to K8AC:

>I use my K2/100 with the 100w atu to drive my Acom 1k amp on 160m and I can
>assure you that my K2 does not behave in this manner. I generally have to
>set the drive level to around 30w to stay within the Irish 400w limit out
>of the amp, I have no problems whatsoever as I move around the band with
>the k2 varying the output power.
>
>the Acom 1k terminates the rig into a 50 Ohm load so the input impedance
>with this amp is fairly constant
>
>I have never had any problems whatsoever with the k2 driving this amp

And despite the same situation here (except no KAT100), I have to report
experience contrary to Brendan's final paragraph.

Other than initial key-down spikes, the K2 is the _worst_ radio I have used
when it comes to output power stability on any band, full stop.

It is clear to me either a K2 is well-behaved in this regard or it 
isn't.  The ~200
watt variation I reported in a previous post was what my K2 does to my ACOM 1k
& we have a 26 dBW limit here, too.

Not good if you're using a 3CX1500A7 instead of a GU74B (potentially bye, bye
grid).  ;^(

73, VR2BrettGraham