These baluns and ununs can be used for impedance matching and also as End Fed halfwave antenna matching transformers to 50 or 75 ohm coax cable.
FT114-31 Ferrite Ring, ID=.748", RFI Range 1-300 MHz, Mix 31, POTA SOTA 1:1 Balun, Coax Choke
Product Details
MPN: F114-31
Type: Ferrite Mix 31
RFI Range (MHz): 1 KHz-300 Mhz
ID-B (in/mm): .748/19
OD-A (in/mm): 1.142/29
Height-C (in/mm): .4
Weight (oz/gm): 33 grams
Initial permeability: 1500
Ferrite Ring Toroid Core, ID = ..748"/23mm, Mix 31
Excellent for 1:1 Balun for dipoles or wind with RG-316 coax for coax choke/Line isolator
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