FABRICATION ANTENNES - Service Manuals
3 manuals available for download
Cheap Antennas for AMSAT LEO Satellites
Construction guide for dual-band 145/435 MHz antennas for Low Earth Orbit satellite communications. Includes detailed dimensions for 2 to 4 element 145 MHz Yagi antennas and 3 to 8 element 435 MHz versions. Features J-driven element design, band splitter circuit using high-pass and low-pass filters with pencil-wound coils, and element mounting techniques. Provides performance comparison with commercial Arrow antenna and tuning procedures. Written by Kent Britain WA5VJB.
The Multi-Dipole: An Economical Multi-Band Wire Antenna
Article by Lew McCoy W1ICP on designing and installing multi-dipole antennas for amateur radio. Covers half-wave dipole formula, impedance principles, SWR considerations, wire selection, invisible antennas, flat cable configurations, bandwidth issues on 80m and 160m bands, practical construction methods, and vertical antenna variants. Includes frequency tables for dipole lengths from 160m to 10m bands and circuit diagrams.
W3HH / T2FD Antenna Analysis and Optimization
Technical article analyzing the W3HH folded dipole antenna (also known as T2FD). Includes impedance measurements, radiation patterns, and current distribution analysis of a YAESU YA-30 model using NEC-2 simulation. Covers horizontal and oblique mounting configurations across HF bands. Discusses transformer design and matching circuits with load resistance optimization.