FB153-43 - 1/2" OVAL ID/12.95mm, RFI Range 25-300 MHz
Product Details
MPN: FB153-43
Initial Permeability (@ 10KHz): 850
Material: NiZn
Max cable size - in/mm: .5/12.6
OD (A) - in/mm: 1.53"/38.5MM
ID (B) - in/mm: 1.03" by .51" OVAL
Length (C) - in/mm: 1.126"/28.6
Z (ohms per bead - single turn 10 MHz): 71
Z (ohms per bead - single turn 25 MHz): 102
Z (ohms per bead - single turn 100 MHz): 152
Z ohms (per bead - single turn 250 MHz): 213
Case/Box lot size: 108
Ferrite Slip On Bead,Oval ID = .505in/12.95mm, Mix 43, 1 piece, 108 per case - make excellent bead baluns/chokes
Oval core make better chokes than circular core - approximately 7 turns RG400/core
50 ohm coax to 75 ohm balanced output baluns are useful for low (< 1 wavelength) dipoles exhibiting 75 ohm characteristic impedance or for matching to balanced ladder line whose endpoint impedance is near 75 ohms.
50 ohm coax to 75 ohm CATV coax connections are easily done with a 1.5:1 unun with SO-239 connectors on input and output. Likewise 50 ohm coax to unbalanced verticals or loads near 75 ohms can be matched with a 1.5:1 unun.