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Delta Quad
And an antenna of my tilting design with a winch 4 DELTA-QUAD elements for the 15m with 2 radiators supplied in phase opposition (180 °) and are spaced 1.77m apart
post 16 Apr 2024
Antenna 15m 21 MHz Links →
2 Eement. FOR 10-12-15MT
Poles are 5 mt length 21 mhz I use four bamboo poles for each element
3 Element Yagis Antennas for HF
Use the DK7ZB-match with 2x75-Ohm-coax for the 28-Ohm-Yagis and 2x50-Ohm-coax for the 12,5-Ohm-Yagis
Delta Quad
2 elements driven in phase inversion, single band for 15 m
25
Poles are 5 mt length 21 mhz I use four bamboo poles for each element
Use the DK7ZB-match with 2x75-Ohm-coax for the 28-Ohm-Yagis and 2x50-Ohm-coax for the 12,5-Ohm-Yagis
2 elements driven in phase inversion, single band for 15 m
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
Build a Three-Way Antenna Switch and Displa To use a wireless relay to select one of two high current capacity power relays
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 factor