On 5/7/2021 10:31 AM, John Crovelli wrote:
For those who have limited space and are unable to lay out an effective ground
system, the vertical dipole offers a very worthwhile alternative to an
Inverted-L or low Inverted-V.
Yes, and so is the end-loading technique shown in the K2KQ design. N6BT
has used it extensively in his designs, and W6GJB and I have used it for
portable designs for county expeditions and Field Day. The Hy-Gain
AV-series and Cushcraft R-series antennas are loaded and trapped
vertical dipoles.
VK4YB's 630m end-fed, end-loaded designs for 630m are an even more
innovative design -- I helped W6GJB tailor one of those designs to his
real estate, and Glen has worked Roger on that band. See VK4YB's qrz page.
The key to these designs is realizing that it's current that does the
radiating, and maximizing the current in vertical section of the
antenna. I do this in NEC by studying the display of current in the View
Antenna window.
73, Jim K9YC
It is relatively easy to build, install, and tune. The K2KQ article has been
followed by hundreds with success.
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