Скачать или смотреть Comparison of Vertical Arrays for Low Band Receiving

Presented by Joel Harrison, W5ZN.

The presenter delivers an in-depth technical analysis of short vertical arrays for low-band receiving, specifically focusing on 160 meters. The session begins with a foundational look at low-band propagation, followed by a detailed breakdown of three major vertical array configurations: the Broadside End-Fire Array, the Hi-Z 8 vertical array, and the YCCC 9-circle array. The presenter walks through the differences in impedance, array structure, beam width, and real-world front-to-back performance, using a decade of empirical data and modeling comparisons to show how these systems perform under various propagation conditions.

The analysis includes rigorous methodology—such as dual pan adapter setups, calibrated test equipment, and signal logging across multiple geographic locations and seasons. Comparisons with traditional 580-foot Beverage antennas provide a baseline, and modeling data, including RDF (Receive Directivity Factor), validates the on-air results. Ultimately, the presenter identifies the Hi-Z 8 array as the top performer for 160 meters, while also highlighting the practicality of the YCCC 9 for limited-space installations and multi-band use. This session offers practical insight for amateur operators looking to optimize receive performance with phased vertical arrays.

Recorded at Hamvention 2025 in Dayton, Ohio.