[Elecraft] 80 Meter Verticals

[Walter Underwood]

I’m not sure what the original post is actually suggesting, but there are three antennas techniques like that, and all have their uses.

A cage element connects everything together to make a fat, low-Q element. Those often have enough bandwidth to work over the entire 80m band. W1AW uses a cage dipole for 80m.

A folded element is a bit shorter and has a higher impedance. It is also more broadband, mostly because of the fat elements, like a cage dipole.

You can also use close-spaced parallel elements that are resonant at slightly different frequencies than the driven element. This is a different way to make a broadband antenna. This design has a name, but it escapes me right now.

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Mar 1, 2017, at 9:46 AM, Jim Brown <jim at audiosystemsgroup.com> wrote:
> 
> On Wed,3/1/2017 5:25 AM, Charlie T, K3ICH wrote:
>> Is there any truth in the theory of making the vertical radiator out of multiple wires such as ladder line and even adding a third wire woven through the ladder sections and fed on one wire?
> 
> Nope. And that's not "theory," that's someone's dumb idea. :)
> 
> BUT -- using multiple spaced conductors in parallel and connecting them at both ends makes the conductor "thicker," which both lengthens it 1-2 percent and broadens the SWR bandwidth. The same thing happens with a tower as compared to a single wire. The vertical part of my 160M Tee vertical is a pair of #12 spaced about 9 inches. When I added the second wire, I observed that my SWR bandwidth approximately doubled.
> 
> 73, Jim K9YC
> 
> 
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