Vertical half-wave aerials for 4m
By G0WJRThis project details three variants of a vertical half-wave antenna design for the 4-meter (70MHz) amateur radio band. The antennas use end-feeding with a parallel-tuned circuit for impedance matching to 50-ohm coaxial cable. The first variant uses suspended flexible wire for portable use, the second employs a fiberglass rod with internal wire for permanent outdoor installation, and the third utilizes aluminum tent poles for quick mobile deployment. Despite the narrow bandwidth of the matching circuit, this suits the narrow 4m FM allocation well. The design offers an effective omnidirectional radiation pattern and can be constructed with readily available materials.
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You will find this resource in just one category on our links directory. The title of the main category is 4M and it deals mainly with Explore a comprehensive directory of 70 MHz antennas for amateur radio enthusiasts. Find designs, plans, and instructions for building your own antennas.. The link to this resource has been on our site since Saturday Sep 16 2006, and it has been followed 8526 times. So far it received 22 votes for a total score of 6.88/10
Last updated: 2025-04-11
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