Yes. The family of beam antennas also includes in addition to antennas using
parasitic elements such as the Yagi, arrays of two or more driven phased
elements, one or more radiating elements in front of a plane reflector, a
termninated rhombic, a helix and many other types. . IIRC sometime
I want to try and build an HF two Element Vertical Antenna for 20 meters.
While there are several java scripted web-sites that will calculate and provide
the physical measurements for the Driven, Reflector elements and spacing.
I would like to use my MJF-259 to complete the fine tuning
I am a little confused here as to what you want to build. A two element beam
or a two element vertical array. Then you go on and site information about
making a beam.
These are two different animals.
So, here are the calculations.in feet
1/2 wave dipole - 468/F or 468/14.2 (20
On Fri, 16 Nov 2007 11:50:44 -0800, you wrote:
I want to try and build an HF two Element Vertical Antenna for 20 meters.
While there are several java scripted web-sites that will calculate and
provide the physical measurements for the Driven, Reflector elements and
spacing.
I would like to
] Mathematically challenged
I am a little confused here as to what you want to build. A two element
beam or a
two element vertical array. Then you go on and site information about
making a
beam.
These are two different animals.
Lee - K0WA
Here's something to think about and it is doable and a no-brainer.
Phase your two verticals. Make each vertical a 1/4 wave and space
them 1/4 wave apart. Tune each one independently for your favorite
frequency. Get the ComtekSystems Phased vertical box with
associated feed lines and you are
Joe,
Making and working with a Phased array is also on my to-do list but I plan on
building the phase box. For now I want to play with a vertical beam and using
the planned operarting frequency times 1.05 gives me the resonant freq for the
reflector provides me the information that I want to
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