12:1 Baluns/Ununs

442283873 - 12:1 Baluns/Ununs
+2

FB37-43 - ID 0.193" Dia (4.90mm) OD 0.375" Dia (9.53mm) Length 0.410" (10.41mm), RFI Range 20-250 MHz

Store/Ferrite Core Products/Mix 43/Slip On - Mix 43 - RFI Range 20-300 MHz
SKU FB37-43-1
$0.40
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FB37-43 - ID 0.193" Dia (4.90mm) OD 0.375" Dia (9.53mm) Length 0.410" (10.41mm), RFI Range 20-250 MHz
Store/Ferrite Core Products/Mix 43/Slip On - Mix 43 - RFI Range 20-300 MHz
Product Details
MPN: FB63-43
Initial Permeability (@ 10KHz): 5000
Material: MnZn
Max cable size - in/mm: .193/4.75
OD (A) - in/mm: .375/9.5
ID (B) - in/mm: .193/4.75
Length (C) - in/mm: .41/10.4
Z (ohms per bead - single turn 1 MHz): 5
Z (ohms per bead - single turn 5 MHz): 20
Z (ohms per bead - single turn 10 MHz): 34
Z (ohms per bead - single turn 25 MHz): 53
Z (ohms per bead - single turn 100 MHz): 80
Z ohms (per bead - single turn 250 MHz): 92

Ferrite Slip On Bead, ID = .193in/4.75mm, Mix 43 - excellent tor individual wire common mode choke, 1 piece

FB37-43 - Solid Free Hanging Ferrite Core 80Ohm @ 100MHz., ID 0.193" Dia (4.90mm) OD 0.375" Dia (9.53mm) Length 0.410" (10.41mm)

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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.