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Re: [TowerTalk] SteppIR 40/30 and loading

Subject: Re: [TowerTalk] SteppIR 40/30 and loading
Date: Wed, 5 Nov 2003 10:58:59 EST
List-post: <>
In a message dated 11/5/03 10:16:22 AM Eastern Standard Time, writes:
>>>No.  A properly designed lumped inductance is better than linear
>loading.  That's why many 80 meter Yagi owners have upgraded to
>W6ANR's aftermarket loading inductors, replacing the original linear
>loading.  Linear loading is a marketing concept to make you think
>you have eliminated the ohmic losses associated with loading 
>coils.  Instead, it *increases* the losses.  
>Rick N6RK

Amen and Ditto!

For those interested and willing to immerse in the "war" about the Current 
Distribution in Antenna Loading Coils, significance on the efficiency of 
antennas, problems with understanding and modeling vs. reality see my article 
some comments at

The arguments are flying at the Newsgroup
in the thread
"Current in antenna loading coil controversy"

Original articles that started the "war" were on by K0BG

The importance of this phenomena is that efficiency of loaded or shortened 
antennas is roughly proportional to the area under the current distribution 
curve along the element. Loading stubs or coils "eat" the portion of the 
curve and reduce the area/effciency. Top loading (T or L) "eats" just the tip 
of the current curve, least area. T loading cancels out the "other" 
polarization, L loading radiates it. The best application is in Moxon 
Rectangle, where it 
provides also element coupling and fantastic F/B for two element antenna. The 
current distribution in the loading coils has significant effect on the 
design of loaded multielement beams, software so far cannot "stomach" it. 
Low Band DXing has it right.

I don't want to start another war here, rather point to what was already 
rehashed and with W9UCW and W5DXP we will prepare concise article on the 
put it on web site and submit to ARRL/QST publications (19th edition of ARRL 
Antenna Book has it wrong)


See:  for "Self Supporting Towers", "Wireless Weather 
Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions 
and ask for Sherman, W2FLA.

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