12:1 Baluns/Ununs

977476626 - 12:1 Baluns/Ununs
+3

FT240-75, ID=1.4", AC/DC/Coax Noise Filter, RFI Range .15-10 MHz, 10 Pack

F240-75-10
$99.95
In stock
1
Product Details
MPN: F240-75
Country/Region of Manufacture: China
RFI Range (MHz): 150 KHz-10 Mhz
ID-B (in/mm): 1.4/35.6
OD-A (in/mm): 2.4/61
Height-C (in/mm): .5/12.7
Weight (oz/gm): 106 grams
Initial permeability: 5000
Case/Box lot size: 100
: 10
: 9.995

Excellent very low frequency RFI suppression and common mode chokes < 10 MHz. Higher choking than Mix 31 under 10 MHz. Use for AC/DC power cables used with switching power supplies, data, audio, video cables for AM broadcast RFI suppression.

Bulk pack of 10 rings.

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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.