12:1 Baluns/Ununs

FB102-43 - 1/2" ID/12.8mm, RFI Range 25-300 MHz

SKU FB102-43-1
$3.30
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100 items$2.6918% off
212 items$2.2532% off
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FB102-43 - 1/2" ID/12.8mm, RFI Range 25-300 MHz
Product Details
MPN: FB102-43
Initial Permeability (@ 10KHz): 850
Material: NiZn
Max cable size - in/mm: .5/12.6
OD (A) - in/mm: 1.02/25.9
ID (B) - in/mm: .505/12.8
Length (C) - in/mm: 1.125/28.6
Z (ohms per bead - single turn 1 MHz): 15
Z (ohms per bead - single turn 5 MHz): 60
Z (ohms per bead - single turn 10 MHz): 91
Z (ohms per bead - single turn 25 MHz): 145
Z (ohms per bead - single turn 100 MHz): 235
Z ohms (per bead - single turn 250 MHz): 275
Case/Box lot size: 212

Ferrite Slip On Bead, ID = .505in/12.8mm, Mix 43, 1 piece, 212 per case - make excellent bead baluns/chokes with shrink wrap exterior for 1/2" cable

12:1 Baluns are useful between 600-650 ohm balanced loads the impedance at the  end of the feed line is 600 ohms (1/2 wavelength feed line), or high impedance feeds for rhombic,  T2FD and traveling wave antennas.

12:1 Ununs are useful between coax and long wires with a load impedance near 600 ohms like a beverage antenna.  Shortwave listener antennas also can benefit with the 12:1 unun and it may provide a better match than 9:1 ununs – this means quieter noise levels and stronger signals so you can hear distance stations easier.