Common Mode Noise Filter – Coax Antenna Tuner RFI Kits Store/RFI Solution Kits/Radio Communication RFI Solutions/Antenna Tuner RFI KitsRefine by FiltersClear allFiltersClear allShow itemsShow itemsFLEX TUNER GENIUS RFI Kit - SO2R/3 Antenna OptionFLEX TUNER GENIUS RFI Kit - SO2R/3 Antenna OptionSKU RFI-AT-FLEX-TG$89.95 Buy Now Typical user comment: The filter was quite effective. Was surprised that it actually reduced the noise level more than the signal so S+N/N improved by 1.9 S units. Bill