Designing VHF/UHF Quad Antenna
The information in this article has come from many amateur sources, the most notable was from WA6TEY (sk 1985) Ray Frost, who was a pioneer of VHF Quad designs and one of the best Southern California Transmitter Hunters. Ray built hundreds two meter quads in single and paired configurations as well as his famous mobile radio direction finding quad.
Visit Designing VHF/UHF Quad Antenna DXZone Resource Page
Or download this file file from Google Drive