Off Center Fed (OCF) Antennas Off Center Fed Antennas Store/Antenna Products/Complete Antenna Systems/Off Center Fed AntennasBuilding your own antenna? Technical info on OCF Antennas HEREAntenna SystemsAntenna SystemsOCF Antenna PartsOCF Antenna Parts OCF antennas are very convenient as they will allow multiple bands of operation with a simple wire antenna which is fed off center with a 4:1 OCF Current balun with built in feed line choke,