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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
Noise suppression with X-phase II This device similar devices are known as QRM eliminators or noise killers, makes it possible
The K9AY loop antenna for 160 and 80m bands You don't have the space to put up a 4 beverage antenna's, an ewe or a 4-square and want 'good ears' on 160 and 80m? no problems try a k9ay loop antenna
Spiderbeam 10-15-20m E' una Yagi tribanda full-size leggera, fatta di tubi in vetroresina e filo