Hits
Antenna Homemade SP3L CobWeb
cobweb-10m-12m-15m-17-20m was the design from g3tpw. and work very well, the only limitation was the small bandwith. after a year i was very happy with this kind of antenna and decided to make a definitive cobweb. this time i built the sp3l variant with an inproved bandwith
post 29 Feb 2024
Antenna Cobweb Links →
Cobweb Antenna omnidirectional
It comprises 5 parallel dipoles bent into a square shape and mounted on a support structure made of fibreglass poles
Cobweb Antenna
The wires above are 12-14 AWG basically speaker cables which are cut to 1/2 wavelength for each band the area of the band you are interested
Cobweb Antennas
These are my SWR readings so far: 28.782→ 1:2 - 24.248→ 1.2 - 20.633→ 1:2 - 17.664→ 1:2 - 14.079→ 1:1
Ultra Light Cobweb Antenna
Cobweb Antena is the best omnidirectional antenna for 6m, 10m, 12m, 15m, 17m, and 20m HF Bands
20
It comprises 5 parallel dipoles bent into a square shape and mounted on a support structure made of fibreglass poles
The wires above are 12-14 AWG basically speaker cables which are cut to 1/2 wavelength for each band the area of the band you are interested
These are my SWR readings so far: 28.782→ 1:2 - 24.248→ 1.2 - 20.633→ 1:2 - 17.664→ 1:2 - 14.079→ 1:1
Cobweb Antena is the best omnidirectional antenna for 6m, 10m, 12m, 15m, 17m, and 20m HF Bands
Take off angle of horizontal antenna For horizontal polarization, the electric field will move sideways on a horizontal plane, while for vertical polarization it will oscillate up and down on a vertical plane
Rx antennas 4Square Rx Vertical Array My frequency design of 1.825 MHz a 90 degrees line would be 33,70 metersinstead of the previously calculated 33,27 m
Calculo da Antena Bazooka A double bazooka antenna is a combination that has a complete coaxial wave multiplied by its velocity factor and a total end-to-end length of 1/4 wave for each side affected by another driver shortening facto