2:1 Baluns/Ununs +2FSB61-1/2, ID=1/2", RFI Range 200-2000 MHz, Bulk Pack of 10Store/Ferrite Core Products/Mix 61/Snap On - Mix 61 - RFI Range 200-2000 MHzSKU FSB61-1/2-10$54.95On Sale$59.50 Save 8%10 $5.95Quantity:1 Add More Add to CartGo to CheckoutSave this product for later Favorite Favorited View FavoritesShare this product with your friendsShareSharePin itFSB61-1/2, ID=1/2", RFI Range 200-2000 MHz, Bulk Pack of 10Store/Ferrite Core Products/Mix 61/Snap On - Mix 61 - RFI Range 200-2000 MHzProduct DetailsInitial Permeability (@ 10KHz): 125Material: NiZnMax cable size - in/mm: .5/12.7OD (A) - in/mm: 1.14/29ID (B) - in/mm: .514/13.1Length (C) - in/mm: 1.14/29Z (ohms per bead - single turn 100 MHz): 205Z ohms (per bead - single turn 250 MHz): 320Z (ohms per bead - single turn 500 MHz): 435Z (ohms per bead - single turn 1000 MHz): 457Ferrite Snap On, ID = .514in/13.1 mm, Mix 61, Bulk pack of 10, RFI range: 200-2000 MHzShow More2:1 (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).