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CHA LEFS 4010 Horizontal and NVIS Deployment Guide

CHA LEFS 4010 Horizontal and NVIS Deployment Guide starts with geometry and frequency. The same broadband wire can produce very different regional and longer-path behavior when its height or shape changes.

Product Installation Guides CHA LEFS 4010 Reviewed 2026-07-14
In plain language: CHA LEFS 4010 Horizontal and NVIS Deployment Guide starts with geometry and frequency. The same broadband wire can produce very different regional and longer-path behavior when its height or shape changes.

A broadband antenna does not have one universal radiation pattern. The useful pattern is produced by the exact wire shape, height, orientation, ground, and band.

The CHA LEFS 4010 puts a full 65 ft HF radiator into a compact 1.1 lb package for operators who would rather carry antenna wire than a heavy support system. Its integrated end assembly combines the suspension point, line winder, 49:1 matching network, and both EFHW and dipole feed connections.

What matters for this decision

  • Use the guide’s horizontal geometry with both wire ends supported around 12–15 ft high.
  • High-angle radiation can support regional paths only when the operating frequency is below the current critical frequency.
  • A good analyzer match does not prove that the ionosphere will support NVIS.
  • Record band, time, geometry, orientation, height, and on-air reports so the result can be repeated.

Why operators choose this system

For POTA, SOTA, hiking, biking, and temporary HOA operation, its strongest advantage is a complete resonant field workflow: raise the feed assembly, pull out the wire, connect the supplied choked RG-316 when that variant is selected, and operate four popular bands without stopping to adjust the antenna.

Published operating reference

  • Published bands without a tuner: 40, 20, 15, and 10 meters.
  • Published tuner-assisted bands: 30, 17, and 12 meters.
  • Published power: 100 W SSB, 50 W CW, and 25 W digital or other modes.
  • Published size: 65 ft wire, approximately 1.1 lb, one-operator setup around 10 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.

Boundary: The optional dipole arms are separate resonant configurations. The 65 ft EFHW wire, the optional dipole sets, and the LEFS 8010 or LEFS FEATHER are not interchangeable merely because they belong to the same product family.
Keep the current guide with the station.

This lesson explains the operating choice in plain language. The current guide still controls assembly, dimensions, power limits, and safety.

Open the LEFS 4010 User Guide 250609 · View the current product page

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