Start with the decision: CHA OCF40 is a balanced off-center-fed dipole with fixed 44- and 22-foot legs; it is not an end-fed wire, does not use radials, and does not produce the same pattern or matching behavior on every supported band.
What changes the result
The exact OCF40 guide controls its unequal 44/22-foot legs, feed assembly, integrated-choke RG-316, horizontal or inverted-V geometry, and 50 W SSB / 25 W CW-or-other-mode limits.
The mistake to avoid
Do not add radials to this balanced dipole, swap the unequal legs casually, or assume one band’s pattern and match apply to every other band.
Use this practical sequence
Inspect and record the final geometry, support and feed line; verify at low power, then recover both unequal legs and feed assembly as one labeled system.
Source boundary
CHA OCF40 User Guide 250513. Use the exact current product, complete configuration, and applicable safety limits.
