12:1 Baluns/Ununs

442300405 - 12:1 Baluns/Ununs
+3

FSB61-1/2, ID=1/2", RFI Range 200-2000 MHz

FSB61-1/2-1
$5.95
In stock
1
Product Details
Initial Permeability (@ 10KHz): 125
Material: NiZn
Max cable size - in/mm: .5/12.7
OD (A) - in/mm: 1.14/29
ID (B) - in/mm: .514/13.1
Length (C) - in/mm: 1.14/29
Z (ohms per bead - single turn 100 MHz): 205
Z ohms (per bead - single turn 250 MHz): 320
Z (ohms per bead - single turn 500 MHz): 435
Z (ohms per bead - single turn 1000 MHz): 457

Ferrite Snap On, ID = .514in/13.1 mm, Mix 61

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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.