[Elecraft] KPA-1500 Power Output Variation

[Jim McCook]

Eric,

If the attenuator had more attenuation that caused the drive to be 
closer to the K-3 output I would think this would reduce the sensitivity 
of the drive level with respect to change in power output.  6w change in 
drive (from a larger input attenuator) from 80w would result in less 
output change (with the smaller attenuator) than with 6w change from 
30w. Is this right?

Jack,

When I change to the tube amp I use all the same cables and connectors 
for RF.  None of the problem occurs.  I have tried substituting cables.  
I have not substituted the feedline of the 40m antenna, though.

Jim