12:1 Baluns/Ununs

3862217727 - 12:1 Baluns/Ununs
+3

Coax Common Mode Noise Filter - 500 Watts PEP, 1-60 MHz, -38dB Common Mode Noise Suppression!

CMNF-500-50
$69.95
In stock
1
Product Details
MPN: CMNF-500-50
Country/Region of Manufacture: United States
Filter Power Rating (PEP watts): 500 SSB (25% duty cycle), 250 Watts CW/FT8 (50% duty cycle)
Choking Impedance (ohms): 1K-14K
Common Mode Attenuation (db): 21-38 db
RFI Suppression Range (MHz): .1-60
Insertion Loss (db): .025
Enclosure Size (inches): 3" x 2 x 1"
Typical Use:: Coax Noise filter at radio end of coax

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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.