[Elecraft] cobweb antenna

[goldtr8@charter.net]

I just built a cobweb last weekend and will get it up in the air this weekend.  I built it for the omni pattern.    I have uses a 1:4 balun single wire design for each band.    I will give an update and comparison between my other three antennas later this weekend.

73
KD8NNU Don
Sent from my HTC on the Now Network from Sprint!

----- Reply message -----
From: "Don Wilhelm" <w3fpr at embarqmail.com>
Date: Fri, May 31, 2013 5:14 pm
Subject: [Elecraft] cobweb antenna
To: <elecraft at mailman.qth.net>

That is not a reasonable statement at all.
It may be that bringing the ends of the dipole close together will allow 
it to be placed close to those objects without the normal de-tuning 
effects, but to state that those objects will not absorb radiated power 
is a real stretch of the imagination.

73,
Don W3FPR

On 5/31/2013 2:59 PM, Vic K2VCO wrote:
> Theoretically, performance should be similar to a dipole, although 
> with a near-omnidirectional pattern (and of course reduced bandwidth). 
> It might be perfect for certain antenna-restricted circumstances.
>
> There is a statement on the G3PTW website which is interesting, and I 
> would like to hear what others say about this:
>
> "The confined electric near field (caused by the high impedance ends 
> of each dipole being close to each other) also ensures that the 
> antenna does not couple to other electrical conductors i.e. telephone 
> wires, power cables, television antennas or even the ground and lossy 
> di-electrics such as trees and buildings. Thus the radiated power is 
> not absorbed by nearby objects, it is all radiated into free space. 
> Breakthrough and noise pick up are also reduced to an absolute minimum 
> and the ground conductivity and height do not affect the antenna tuning."
>
> Does this sound reasonable?
>
> On 5/31/2013 10:46 AM, Yngvi (TF3Y) wrote:

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