[Antennas] Loading Coil Placement

[A10382]

The first portions of the radiator have the highest current - and
current continues to decline out to the end as the voltage increases
(it's amazing how the laws of physics just can't be manipulated).
Putting the coil at least 1/3 the way out from the feed point will not
give up much in the way of radiation.

An article in QST within the past 12 months had the formulae to calc how
much inductance and capacitance was needed when shortening a radiating
element - including how to calculate the place to out the coils, and how
much shorter the remaining leg could be.  As I remembered, it seemed all
doable with nothing more than a calculator (or pencil & paper if you
learned basic math before 1970 - and NOT the 'new math' of the 90's
where "almost is close enough" and "well, your answer is incorrect, but
you tried real hard so you do get a passing grade").

===
Frank
 ._._.


----- Original Message -----
Sent: Wednesday, July 13, 2005 9:29 AM
Subject: Re: [Antennas] Loading Coil Placement

> >From what I have seen on the market, commercially made, I don't see
how you can
> go wrong by just putting each coil in the approximate center of its
leg. It's a
> tradeoff but not critical.
>



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