25:1 to 81:1 Baluns/Ununs These baluns and ununs can be used for impedance matching and also as End Fed halfwave antenna matching transformers to 50 or 75 ohm coax cable. +2FSB61-1/4, ID=1/4", RFI Range 200-2000 MHz, Bulk pack of 10Store/Ferrite Core Products/Mix 61/Snap On - Mix 61 - RFI Range 200-2000 MHzSKU FSB61-1/4-10$34.9510 $4.95Quantity:1 Add More Add to CartGo to CheckoutSave this product for later Favorite Favorited View FavoritesShare this product with your friendsShareSharePin itFSB61-1/4, ID=1/4", 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: .25/6.3OD (A) - in/mm: 1.22/14.3ID (B) - in/mm: .26/6.6Length (C) - in/mm: 1.55/39.4Z (ohms per bead - single turn 100 MHz): 230Z ohms (per bead - single turn 250 MHz): 355Z (ohms per bead - single turn 1000 MHz): 420Ferrite Snap On, ID = .26 in/6.6mm, Mix 61, Bulk pack of 10Show More