2:1 Baluns/Ununs FSB Mix 43 - RFI Range: 20-300 MHz Store/Ferrite Core Products/All Snap On Split Beads/FSB Mix 43 - RFI Range: 20-300 MHzRefine by FiltersClear allFiltersClear allShow itemsShow itemsFerrite Flat Cable RFI/Noise Filter, 1.35" wide slot RFI Range 10-500 MHz, 1 PieceFerrite Flat Cable RFI/Noise Filter, 1.35" wide slot RFI Range 10-500 MHz, 1 PieceSKU FSB43-1.35-1$5.95 Buy Now 2:1 (100:50) Baluns are useful between 50 ohm coax and 100 ohm balanced lines for loops, cubical quads, log periodics and other antennas where the impedance at the end of the feedline is 100 ohms (1/2 wavelength feedline).