12:1 Baluns/Ununs

442300382 - 12:1 Baluns/Ununs
+2

FSB31-1/4, ID=1/4"/6.3mm, RFI Range 1-300 MHz, Bulk Pack of 10

Store/Ferrite Core Products/Mix 31/Snap On - Mix 31 - RFI Range 1-300 MHz
SKU FSB31-1/4-10
$24.95
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FSB31-1/4, ID=1/4"/6.3mm, RFI Range 1-300 MHz, Bulk Pack of 10
Store/Ferrite Core Products/Mix 31/Snap On - Mix 31 - RFI Range 1-300 MHz
Product Details
Initial Permeability (@ 10KHz): 1500
Material: MnZn
Max cable size - in/mm: .25/6.3
OD (A) - in/mm: .788/20
ID (B) - in/mm: .26/6.6
Length (C) - in/mm: 1.55/3.94
Z (ohms per bead - single turn 1 MHz): 28
Z (ohms per bead - single turn 5 MHz): 83
Z (ohms per bead - single turn 10 MHz): 105
Z (ohms per bead - single turn 25 MHz): 180
Z (ohms per bead - single turn 100 MHz): 310
Z ohms (per bead - single turn 250 MHz): 240

Ferrite Snap On, ID = .26 in/6.6mm, Mix 31, 10 pieces.

Use for AC/DC, audio/Video/data and RF (coax) cables.

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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.