[Antennaware] Interesting Antenna Design

[bw_dw at fastmail.net]

Nice Karin!
You might eventually consider buying an automatic "L" network tuner.
You might find that wire will play on a number of bands above 20.

Have fun!!
N1BBR

On Tue, Jun 14, 2022, at 12:00 PM, Karin Johnson wrote:
> Hello Group:
> I recently have put up a wire antenna for 20 Meters. It is a three-eights
> wavelength wire vertical cut for the low end of the 20 Meter band. I have an
> appropriate matching network at the base of the vertical.  It works like
> text book. 
> So I've been thinking.  I am a bit compromised with real estate and space
> for a few more antennas.  You can never have enough antennas.  So I was
> thinking, I am wondering if the 3/8 wavelength wire is resonant on any other
> band.  Lo and behold, it is the perfect length for a 3/4 wavelength vertical
> wire for the low end of the 10 meter band. Sooooooooo ! ! !
> I designed a new outside matching network to handle both bands.  
> The new matching network incorporates two vacuum relays, a vacuum variable
> capacitor for the 20 meter portion, and a 1 to 4 balun for the 20 meter
> band.  Plus at the shack end of the coax a Bias Tee inserter for control
> power of the relays.
> I am including link to Google Drive if anyone is interesting in seeing the
> design concept.  It is below:
>
>
> https://docs.google.com/presentation/d/1RBxngC3pf0Uop47BVKCdPKaZac4260RU/edi
> t?usp=sharing&ouid=101983102297392238928&rtpof=true&sd=true
>
>
> I haven't seen much activity on this list for a while and thought I might
> provoke some comments.
>
> Regards,
>
> Karin Anne Johnson  K3UU
> Palm Harbor, Florida
>
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