All-Band Vertical Antenna Construction and Performance
Description
This resource details the construction and operational characteristics of a multi-band vertical wire antenna, designed for operation across 80m, 40m, 30m, 20m, 17m, and 10m bands. The antenna utilizes a 67-foot vertical wire, configured as a quarter-wave radiator on 80m. The design incorporates a 1:1 current balun for RF isolation on 80m, 30m, and 17m. For 40m, 20m, and 10m, where impedance is significantly higher due to half-wave or full-wave resonance, an additional impedance transforming unun is employed. The article discusses impedance considerations for various bands, noting high feedpoint voltage on 40m, 20m, and 10m, and a higher impedance on 17m. Performance as a receiving antenna is also addressed, noting reduced noise compared to a horizontal loop antenna. The project focuses on practical antenna deployment and impedance matching techniques for multi-band vertical operation.