Common Mode Noise Filter – Coax +3 UHF PL259 to BNC Female Jack Adapter UHFMBNCF $3.95 In stock Quantity: 1 Add to Bag Product Details MPN: UHFMBNCF Save this product for later Favorite 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