[Elecraft] KPA1500 Drive Power

[K9MA]

I'm using the K3 with the Elecraft interface cable.  I've noticed the 
the CW drive power required by mine varies considerably, both with 
temperature and SWR.  If I set the K3 output for a KPA1500 output of 
1500 W output initially, the output will drop to perhaps 1100 W when the 
temperature stabilizes at around 65 C.  (I've ruled out any change in 
antenna impedance, etc.)  A similar change occurs if the SWR goes from 
1:1 to 1.2:1 when changing frequency or switching antennas.  I haven't 
changed the ALC from the default setting.  Has anyone else noticed this?

73,

Scott K9MA

-- 
Scott  K9MA

k9ma at sdellington.us