Start with the operating decision: Choose CHA OCF40 when a 66-foot portable off-center-fed dipole fits the site and 40/20/10/6 meters without a tuner—plus five documented tuner-assisted bands—matches the operating plan.
How the system behaves
The 44-foot and 22-foot legs, feed assembly, 25-foot RG-316 with integrated choke, support geometry, and 50 W SSB / 25 W CW-or-other-mode limits form the product decision.
The boundary that prevents mistakes
Compare required three-support horizontal or one-center-support inverted-V space, power, tuner needs, band plan, packed weight, public clearance, and recovery time against complete alternatives.
Use this field sequence
Define the exact configuration and intended path, inspect the complete installation, begin measurements at low power, record the result, and change one variable at a time.
Source boundary
CHA OCF40 User Guide 250513. Use the exact current configuration, components, feed, support, geometry, power, and safety limits; mechanical fit does not establish compatibility.
