easy quad calculator enter center frequency to get a quad antenna size. This resource is listed under Antennas/Antenna Calculators | Antenna, Calculator, Antennas
Cubical Quad Antenna
Cubical Quad Antenna
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Cubical Quad Antenna
Lightning Antennas L2 Quad
Cubical Quad Design
A small VHF/UHF cubical quad antenna
Fiberglass Cubical Quad Spreaders - Max-Gain Systems