[Elecraft] TX IMD

[Paul Christensen]

> "One factor that affects IMD is power supply voltage variation under
load.  The standard PS cable that comes with the K3 drops several tenths
of a volt at max power.  Add that to power supply regulation and
internal voltage drop in the K."

In addition to lowering the AWG size, I am using a Lambda linear supply with 
remote Hi-Z sensing terminals (A pair of  #12 AWG for supply, and #22AWG for 
sense).

The PS detects the IR drop at the load, then compensates for the duration of 
the IR sag back at the PS.  It works quite well for CW and PSK, although I 
have not performed any tests to measure the Lambda's response time to the 
supply line IR drop.  So, the sensing lines may or may not be keeping up 
with the instantaneous sag in order to be of any benefit in SSB TX mode.

Paul, W9AC