CHA EMCOMM III Base Product DNA: Complete System Overview

A customer should be able to see the complete antenna before buying: the radiator, transformer, feed line, return path, support, and what the package does not include.

The CHA EMCOMM III Base is the deliberate member of the EMCOMM family: a full 130 ft radiator and weather-resistant matching transformer for stations that can invest in support height, routing, and a repeatable base installation. It is intended to cover short, regional, and long-distance HF jobs without changing antennas for every band.

What matters for this decision

• Its 130 ft length can be shaped as an inverted-L, end-fed inverted-V, half square, or end-fed sloper. Those four layouts let the site decide whether the priority is compact suburban use, broad regional coverage, stronger 7–20 MHz directional behavior, or integration with an existing conductive tower or mast.
• Weather-resistant matching transformer with SO-239, radiator, counterpoise connection, and suspension hardware.
• One 130 ft insulated antenna wire on a line winder.
• Isolation rings, wire connector, and carabiner for controlled suspension and strain relief.
• Dacron rope, coax, counterpoise wires, support structures, and lightning/surge design remain installation choices unless explicitly included.
• Use the current product listing to confirm the exact purchased variant and package contents.

Why operators choose this system

Its 130 ft length can be shaped as an inverted-L, end-fed inverted-V, half square, or end-fed sloper. Those four layouts let the site decide whether the priority is compact suburban use, broad regional coverage, stronger 7–20 MHz directional behavior, or integration with an existing conductive tower or mast.

Published operating reference

• Published continuous frequency range: 3.5–30 MHz.
• Published power: 200 W SSB and 100 W other modes under intermittent commercial/amateur service.
• Published wire length and weight: 130 ft and approximately 2.2 lb.
• Published setup: one trained operator in less than 30 minutes after the site and supports are ready.

Make the next deployment repeatable

Record product revision, configuration, wire dimensions and bearings, endpoint heights, support hardware, return path, coax and choke condition, tuner state, analyzer reference plane, weather, and on-air reports.