Gene Fuller wrote:
Why would something "referenced to the source phase" change when that
source itself was changed?

In my EZNEC examples the source current reference
phase is zero and all the currents at the various
points are referenced to that zero source phase.

If the source current phase is changed, the phase
of all the currents at the various sampling points
change.

In TravWave.EZ, the current is sampled by a zero
ohm load in segment 10 of the wire.

Source phase Seg 10 phase
0 deg -47.82 deg
-10 deg -57.82 deg
+10 deg -37.82 deg

The current in Seg 10 is clearly referenced to the
phase of the source and obviously lags the source
phase by 47.82 degrees.
--
73, Cecil http://www.w5dxp.com