Yuri Blanarovich wrote:
W8JI and other unbelievers that antenna and loading coils can not be
expressed in electrical degrees, can find another example in ON4UN's Low
Band DXing book, 4th edition, page 9-47, Fig 9-58, showing loaded vertical
with mast being 40 deg. 59.6 ft. long, loading coil of 144 uH taking
(replacing radiator of) 40 deg and whip of 10 deg and 14.9 ft long, for
overall 90 deg electrical and quarter wave resonant system.
Soooo, to anyone outside of "equal current worshippers" it is obvious that
coil is replacing 40 deg worth of radiator and it would drop equivalent
amount of current across the coil that corresponds to the length of radiator
that coil replaces, because rest of the "straight" radiator FORCES IT TO
DO - because of standing wave and current.


That is not correct Yuri.

Anything from a pure inductance to a very poor distributed inductor
(like a linear loading or stub) can be used and all would have
different characteristics.

A pure inductance would have no current difference at each end. A good
compact inductor would have negligible current difference at each end,
only a long straight wire would act like the "missing antenna".

One way to prove the coil does not replace missing length is to simply
move the coil to a new location in a fixed height antenna. If the coil
looked like 40 degrees, it would resonate the antenna no matter where
it was installed.

73 Tom