Hits
Helix Antennas for HF Mobile
20 meter helix antenna. The antenna is approximately 65 turns of #14 AWG THHN stranded wire wound on a 1 1/2'' cpvc coil form
post 14 Mar 2024
Antenna CB 27 MHz Links →
Easy to build Deltaloop for 27.555MHz 11m, DL5DBM
In this setup you have a horizontal polarisation, the total length of the wire is 11,07 meters
Easy to build compact quad antenna
If you want to communicate with mobile units, with vertically polarized antennas then you must use vertival polariztion
Extended Double Zeppelin 27.500
Full wavelength: 300 / 27.555 = 10.887 x 0.94 = 10.234 m Top sections of antenna: 0.64 wavelength: 10.234 x 0.64 = 6.550 m for each leg
Hb9cw for 27 mhz
For 27.500 Mhz lambda=10.9091 m 1/2 lambda/100=5.5 cm
80
In this setup you have a horizontal polarisation, the total length of the wire is 11,07 meters
If you want to communicate with mobile units, with vertically polarized antennas then you must use vertival polariztion
Full wavelength: 300 / 27.555 = 10.887 x 0.94 = 10.234 m Top sections of antenna: 0.64 wavelength: 10.234 x 0.64 = 6.550 m for each leg
For 27.500 Mhz lambda=10.9091 m 1/2 lambda/100=5.5 cm
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