[R-390] Small Voodoo Antennas - a Vertical!

[Rbethman]

Hey Gang!

Take this in another direction.  Using one of those 50 ohm antenna 
connectors, I attacged two fiberglass arrow shafts.  I joined them 
together with a 1/4" dowel.  I wound its length with #26 enameled wire 
VERY tightly and closely wound.

I have NO idea as to its impedance.  BUT - my den is mostly below ground 
level.  The recption ia AS GOOD as an outdoor antenna of either dipole 
or ant other I've strung!

The R-390A loves it and performs flawlessly.  YMMV.  But it sure works 
for me!

Bob - N9DGN

Bob Camp wrote:

> Hi
>
> If Maxwell is right (and in better than a century nobody's proved 
> different) then you can make some pretty neat smaller antennas. The 
> problem is that nobody has ever figured out how to do a good enough 
> job of it.
>
> This actually gets back to another R390 issue I keep fishing around on.
>
> One of the ways to do a "compact dipole" is with a small resonant 
> loop. The output impedance of these things can be almost anything 
> depending on their design. They are inherently a low noise balanced 
> antenna and you mess them up a bit when you convert them to a balanced 
> line. The lowest noise configurations are generally shielded and 
> balanced.
>
> Now let's see, shielded balanced antenna that may have an unusual 
> impedance. What radio's antenna input does that bring to mind?
>
> So far I have found absolutely no evidence that such an antenna ever 
> figured into the design of the 390, but I keep fishing.
>
>     Enjoy!
>
>         Bob Camp
>         KB8TQ
>
<                      Bob Bethman - N0DGN
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| N0DGN AMRadio Manassas, VA    |    REAL Tube Radio and AM        |
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|           Amateur Astronomer - Celestron Nexstar 8               |
|             12" f5 Dob coming soon!  Being built                 |
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