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Antennas Slingshot 144mhz
The completed antenna is bi-directional.For 144.200Mhz calculator: 11808/144.200 = 81.88 inches 3/4 wavelength = .75 x 81.88 = 61.4 inches total element length per side
1/4 wavelength would be = 81.88 / 4 = 20.47inches or 1/3 of 61.4 inches. The vertical section takes 2/3rds of the total length of one side of the antenna element
The 90 degree bend will be at the 1/4 wave point on the total length.
post 06 Jul 2024
Antenna for UHF VHF Links →
Antennes Slim Jim 145 Mhz
Setting the R.O.S. is simple, it is done by moving the 2 bars of domino
Array 2 yagi 5 elementi VHF
Le caratteristiche sono queste 5-Element 28-Ohm-Type Boom 2m, Gain 9dBd F/B > 20dB
Big wheel 432 Mhz
Simile ad un trifoglio, in parallelo nonche' in fase e posizionati a 120 gradi fra loro,coprendo cosi' una circonferenza virtuale
155
Setting the R.O.S. is simple, it is done by moving the 2 bars of domino
Le caratteristiche sono queste 5-Element 28-Ohm-Type Boom 2m, Gain 9dBd F/B > 20dB
Simile ad un trifoglio, in parallelo nonche' in fase e posizionati a 120 gradi fra loro,coprendo cosi' una circonferenza virtuale
Antenna splitter per VHF-UHF per quattro ricevitori Chi dispone di una sola antenna e vuole collegarvi più di un ricevitore necessità di uno splitter
Amateur radio kits by Kanga US
50MHz to 28MHz RX Converter The concept of the rx converter is quite simple and nothing really new. the local oscillator is a standard colpitts crystal oscillator producing the 22mhz lo signal