Off Center Fed (OCF) Antennas Microphone/Speaker Audio RFI Store/RFI Solution Kits/Radio Communication RFI Solutions/Microphone/Speaker Audio RFIRefine by Sort byWe recommendNewest arrivalsPrice: Low to HighPrice: High to LowName: A to ZName: Z to AFiltersClear allFiltersClear allShow itemsShow itemsAudio RFI Suppressor for XLR cables - Simple in line filtering with male/female extension, Select AM Broadcast or Ham Band Filter RangeAudio RFI Suppressor for XLR cables - Simple in line filtering with male/female extension, Select AM Broadcast or Ham Band Filter RangeSKU RFI-XLR-6AM$29.95 Buy NowNEWHeil Parametric Receive Audio System RFI Kit - 6 filtersHeil Parametric Receive Audio System RFI Kit - 6 filtersSKU RFI-PRAS$49.95 Buy NowRFI Suppressor for F Connector Cables - Simple in line filtering with male/female extension, Select AM Broadcast or Ham Band Filter RangeRFI Suppressor for F Connector Cables - Simple in line filtering with male/female extension, Select AM Broadcast or Ham Band Filter RangeSKU RFI-F-AM$29.95 Buy Now 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,