[Elecraft] K3/100 input voltage and TX IMD

[alsopb at nc.rr.com]

I rearranged things to shorten up the K3 supplied cable to 3'.

The difference between just the RX ON (1.11 amps) and 100 watts (18.77 amps) ended up being 0.6 volts.  Supply is an Astron 20A. 

Previously with a 6' cable the difference was 1 Volt.

Interesting thing is the current draw at each power level was not what I expected.  I expected the higher voltage to lower the current at each power level.  It did but a miniscule amount.  At 10 watts the difference was 0.03 amps.  At 100 watts the difference was 0.02 amps.   I expected a lot more.
The endpoint voltage for the long cable was 12.7 V.  For the short cable is was 13.9 volts.  I kind of expected the 100 watt amperage to decrease as the ratio of these two voltages.  Doing the math, the expected current draw would have been 1.6 amps versu the 20 milliamps.  

Can someone explain this anomoly?
Brian/K3KO