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Slim jim antenna project
The Slim Jim is a vertically polarized omnidirectional end-fed antenna having considerable gain
post 29 Jan 2024
Antenna jpole Links →
144/440 MHZ copper J-POLE antenna
This antenna is built almost entirely of hardware store items with the exception of thr feedpoint connector and works as well or better than most commercial
450 Ohm Ladder Line J-Pole For 144 & 440 MHz
The best part about it is that it can be used on 2m and 70cm and it is cheep and easy to build
A VHF UHF Dual-Band J.pole
The J-Pole has no ground radials and it is easy to construct using inexpensive materials. For its simplicity and small size, it offers excellent performance
435 MHz J-Pole Antenna
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This antenna is built almost entirely of hardware store items with the exception of thr feedpoint connector and works as well or better than most commercial
The best part about it is that it can be used on 2m and 70cm and it is cheep and easy to build
The J-Pole has no ground radials and it is easy to construct using inexpensive materials. For its simplicity and small size, it offers excellent performance
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