Portable and outdoor antennas are assembled, loaded, exposed, and recovered repeatedly. A loose termination or damaged feed line can imitate a tuning or propagation problem.
The CHA EMCOMM III Portable gives a field station more wire and more deployment choices than the smaller EMCOMM II V2 while remaining a one-pound, one-operator system. Its 73 ft radiator, transformer, line winder, and suspension hardware are designed to move from a backpack to an operating site in under 15 minutes.
What matters for this decision
- Lower the antenna safely before inspecting it.
- Check wire insulation, terminations, suspension points, transformer seals, connectors, coax flex points, support line, and strain relief.
- Substitute a known-good feed line when inspection does not expose the fault.
- Dry and clean the system before rewinding it; do not trap grit, moisture, or sharp bends.
Why operators choose this system
The operator can choose a sloping wire or inverted-L when there is time to use one or two supports, an end-fed inverted-V when one center support and a faster layout make more sense, or a horizontal NVIS arrangement when regional coverage is the priority.
Published operating reference
- Published continuous frequency range: 1.8–55 MHz.
- Published power: 50 W continuous duty and 100 W intermittent duty.
- Published wire length and weight: 73 ft and approximately 1 lb.
- Published setup: one trained operator in less than 15 minutes.
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.
This lesson explains the operating choice in plain language. The current guide still controls assembly, dimensions, power limits, and safety.
Open the EMCOMM III Portable User Guide 250519 · View the current product page
