2:1 Baluns/Ununs

442300472 - 2:1 Baluns/Ununs
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FSB31-1, ID=1", RFI Range 1-300 MHz, Bulk Pack of 3

Store/Ferrite Core Products/Mix 31/Snap On - Mix 31 - RFI Range 1-300 MHz
SKU FSB31-1-3
$49.95
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List price $58.50
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FSB31-1, ID=1", RFI Range 1-300 MHz, Bulk Pack of 3
Store/Ferrite Core Products/Mix 31/Snap On - Mix 31 - RFI Range 1-300 MHz
Product Details
MPN: FSB31-1
Initial Permeability (@ 10KHz): 1500
Material: MnZn
Max cable size - in/mm: 1.0/25.4
OD (A) - in/mm: 2.22/56.4
ID (B) - in/mm: 1.02/25.9
Length (C) - in/mm: 1.69/41.9
Z (ohms per bead - single turn 1 MHz): 45
Z (ohms per bead - single turn 5 MHz): 90
Z (ohms per bead - single turn 10 MHz): 125
Z (ohms per bead - single turn 25 MHz): 218
Z (ohms per bead - single turn 100 MHz): 375
Z ohms (per bead - single turn 250 MHz): 340
Case/Box lot size: 36

Also known as Big Clamp On. Very useful for AC/DC power, coax cable, etc. Use multiple turns for best results or multiple chokes in series (recommended for large amperage power cables). Always put +/- dc cables through the same ferrite filter so their fields cancel and the ferrite suppresses the common mode current on each cable.. Bulk pack of 3

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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).