Of Horses and Hams
One example of how amateur radio provides safety and service to the pubic providing otherwise impossible communications using the “Magic Band.”
Ham Radio . Magnum Experimentum
Antennas, experiments, engineering and other articles of interest to radio folks.
One example of how amateur radio provides safety and service to the pubic providing otherwise impossible communications using the “Magic Band.”
My first journey to the mountains as SOTA activator was a success using minimalist VHF FM gear.
The clever application of the folded dipole loop, computer science iteration techniques and NEC simulation to Yagi-Uda design results in a panoply of practical planar Loop Fed Array, LFA Yagi antenna recipes.
The traditional collinear J-Pole, aka Super-J, improves the basic J-Pole. Are further improvements possible? By replacing the phasing stub with a simple coil, the answer is yes. The result is the Collinear J-Pole.
The Northern Virginia team of Ham Radio operators and companion hikers manned Hawksbill Mountain for the 2011 Appalachian Trail Golden Packet event. Gear included a Kenwood D710 with Green Light Lab GPS, 2m Collinear J-Pole and a 70cm collinear J-Pole.
Hiking, ham radio, hills and a portable collinear J-Pole combine to make the Golden Packet Test a memorable event.
We remove the mystique surrounding the 5/4 wave antenna comparing center and end fed approaches. One conclusion is the end fed 5/4 wave antenna shows little promise as a vertical antenna for terrestrial use.
Longer is not always better in the world of antennas. Such is the case of the 5/4 wave vertical antenna… a Super J-Pole Wannabe Antenna.
This J-Pole, Monopole, Coaxial Dipole VHF EZNEC shootout addresses a comment made that no models exist for j-pole and coaxial dipole antenna simulation.
Choke Baluns are a good thing and antenna manufacturers should provide them on their balanced antennas.