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2 Meter-70 Centimeter Mobile Halo Antenna
2 m 70 cm dual band antenna, horizontally polarized antenna, with aluminum rod for the radiant element and also copper tube
post 13 Apr 2024
Antenna for UHF VHF Links →
10 El.Homebrew UHF Yagi for Satellites
Ideal relationship between length & Gain... for 3-4 DBd more Gain we need in practice about a double Boom in length and much higher number of Elements
144 mhz long yagi constrution details
Uses .125' 3.175 mm diameter aluminum elements, which are to be supported on two parallel non conducting lines that will not stretch
2 meter Halo antenna
Flat aluminium bar is the easiest material to make an antenna with as it is easy to bend and if 3 mm or more thick, is strong enough for most applications at VHF and UHF
2 Meter portable Zigzag antenna
All you need it some stranded hook-up wire, wooden or plastic battens as supports and a 102 inch 2.59m length of 450 ohm
155
Ideal relationship between length & Gain... for 3-4 DBd more Gain we need in practice about a double Boom in length and much higher number of Elements
Uses .125' 3.175 mm diameter aluminum elements, which are to be supported on two parallel non conducting lines that will not stretch
Flat aluminium bar is the easiest material to make an antenna with as it is easy to bend and if 3 mm or more thick, is strong enough for most applications at VHF and UHF
All you need it some stranded hook-up wire, wooden or plastic battens as supports and a 102 inch 2.59m length of 450 ohm
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