Common Mode Noise Filter – Coax Antenna Rotor RFI Solutions Store/RFI Solution Kits/Radio Communication RFI Solutions/Antenna Rotor RFI SolutionsRefine by FiltersClear allFiltersClear allShow itemsShow itemsAntenna Rotor RFI Kit - fits all Wired Rotors up to 1/2" cable sizeAntenna Rotor RFI Kit - fits all Wired Rotors up to 1/2" cable sizeSKU RFI-Rotor$39.95 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