[Elecraft] Portable antenna

[Charles Greene]

Bill,

Three points.  1. The vertical performs a little better than both the 
Hustler 6BTV with 22 radials and the G5RV on both receive and transmit 
which it would not do if it were that much worse (5 and 8 dB respectively) 
that those two on receiving noise.  2. There are many studies that indicate 
that using more than two (or four for symmetry) radials does not improve 
the performance of elevated radial verticals.  3. When I modelled the 
antenna using EZNEC, going from two to 16 radials did not improve the 
performance at all. In fact, the model showed that 4 radials was less 
efficient than two.  If you like, I will send you my EZNEC file.

At 07:55 AM 9/30/2002 -0400, Bill Coleman wrote:
>On 9/28/02 2:11 PM, Charles Greene at W1CG@QSL.net wrote:
>
> >I really can't explain why the vertical is so low noise (my house isn't
> >that noisy), and I would have guessed it would have performed a little less
> >well than the doublet and the vertical antenna with a fair number of
> >radials.
>
>Uh, that's easy. Your vertical is low noise because it is so lossy. The
>two 2 foot radials are probably not doing much of anything, and you're
>working against lossy ground.
>
>Put 25-30 1/4 wave radials 1 foot off the ground and you'll soon find the
>antenna is much more noisy, but it will be a lot more efficient, too.
>


73, Chas, W1CG
K2 #462