[Elecraft] [KX3] Urban stealth HF: Inside-the-backpack loop antenna?

[Gwen Patton]

>
> Jim Said: Cut a large double sided piece of double sided circuit board to
> fit the
> backpack. Etch the back side with a symmetric Hilbert curve split into 2
> columns fed
> at the bottom center and the two columns attached at the top.


 Just don't accidentally etch a Do-Nha curve, or you might wind up with a
summoning grid that attracts alien monstrosities from beyond spacetime
that'll eat your brain. hi hi

73,
Gwen, NG3P

(In reference to this:
http://radiopsychedelica.blogspot.com/2014/01/dho-na-curve-of-sleeper.html)

On Thu, Jan 24, 2019 at 1:37 AM Jim Shepherd <nvjims at gmail.com> wrote:

> Cut a large double sided piece of double sided circuit board to fit the
> backpack.
> Etch the back side with a symmetric Hilbert curve split into 2 columns fed
> at the bottom center and the two columns attached at the top.  Leave the
> other side as a solid ground plane... It will take some work to make a
> matching network, but the length of the 'curve' can easily be a half wave
> on 20 meters. It will be directional to your rear as you walk along.
>
> Jim W6US
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