Cecil Moore wrote:

...
Note that the electrical length and the physical length
are nowhere near the same value. The electrical length
can be 90 degrees at resonance while the physical length
is only 13 degrees for a 75m mobile antenna.
...

I have been thinking on this. From past posts, I think some think that
a 1/4 wave monopole and a 1/2 wave electrical length monopole shortened
to 1/4 physical length have very similar launch/radiation
characteristics... if they do, then it is obvious that their modeling
program is "BLOWING SMOKE!"

A 90 degree shift in 1/4 wave physical space will never duplicate a 180
shift in the same physical dimensions!

Regards,
JS