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Chameleon Knowledge Base · The Complete Online HF Antenna Handbook

CHA F-LOOP 3.0 Safety, Inspection, and Maintenance

High circulating voltage and current exist in a tuned loop. Remove RF before touching or adjusting it, keep the loop clear of people and metal, protect the non-water-resistant assembly from weather, and inspect tuning, loop joints, coupling loop, support, and coax before reuse.

Product Installation Guides CHA F-LOOP 3.0 Reviewed 2026-07-14
Start with the operating decision: High circulating voltage and current exist in a tuned loop. Remove RF before touching or adjusting it, keep the loop clear of people and metal, protect the non-water-resistant assembly from weather, and inspect tuning, loop joints, coupling loop, support, and coax before reuse.

How the system behaves

High circulating voltage and current exist in a tuned loop. Remove RF before touching or adjusting it, keep the loop clear of people and metal, protect the non-water-resistant assembly from weather, and inspect tuning, loop joints, coupling loop, support, and coax before reuse.

The boundary that prevents mistakes

The loop’s compact 34-, 36-, or 48-inch diameter can fit sites that reject long wires or radial fields, but narrow 2:1 bandwidth, manual tuning access, 25 W intermittent SSB / 10 W continuous-mode limits, and sensitivity to nearby metal are real operating costs.

Use this field sequence

Assemble only one guide-defined radiator arrangement, support the loop without distorting it, keep people and conductors clear, connect the feed line, set the tuning capacitor before applying power, and rotate the completed antenna for the required signal or noise null.

Source boundary

CHA F-LOOP 3.0 User Guide 221107. Use the exact current configuration, components, feed, support, geometry, power, and safety limits; mechanical fit does not establish compatibility.

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