[TowerTalk] Fan Dipole

[Jim Brown]

Tom Schiller, N6BT, has produced a lot of great designs using this 
technique, and may have been the originator of it. His book is sort of 
rambling and is in serious need of an editor, but the technical content 
is excellent. Strongly recommended -- any ham who cares about antennas 
should study it. Among other things, it debunks a lot of phony 
advertising claimes, and provides excellent "BS filters" for use when 
reading advertising claims and even product data sheets. Tom's work 
produced the excellent Force12 antennnas. He may be the finest antenna 
designer of his generation.

https://www.amazon.com/Array-Light-Third-Straight-antennas-ebook/dp/B07B8D6LJB

73, Jim K9YC

On 2/17/2020 9:51 PM, Dan Maguire wrote:
> That's called a "Coupled-Resonator" dipole.  For details on modeling
> something like that see:
> 
> https://ac6la.com/aecollection4.html#15b
> 
> Dan, AC6LA
> 
> --------------------------------------------------------------------------------------
> On Mon, 17 Feb 2020 14:41:19 -0500 Dave Sublette wrote:
> 
> I added a #14 THHN wire spaced 12" above my 40 meter rotary dipole. I cut
> it to about 46 feet +/-.  I modeled it on a program called Antenna Model.
> With NO connection to the existing 40 meter dipole or its feedline, the
> antenna is now a well matched antenna for both 30 and 40 meters.  The
> spacers were 1/2 inch fiberglass rods sawn from electric fence posts bought
> at a local farm supply store. The stand offs were fastened to the dipole
> element with short pieces of aluminum angle and U-bolts.  I only used three
> spacers for each half of the dipole.
> 
> This is the same technique pioneered by Force 12 antennas.  It works.
> 
> 73,Dave, K4TO
> _______________________________________________
> 
> 
> 
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>