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.
DC Cable Noise Filter for 2 Gauge and Smaller Wire - 1.4" ID
Product Details
MPN: ACCF-3
Type: New
Country/Region of Manufacture: United States
RFI Range (MHz): 150 KHz to 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
(2.4″ OD, 1.4″ ID hole), RFI Noise Suppression Range: 150 KHz-10 MHz, Mix 75
Excellent for large cables or multiple cables – use multiple cores for higher choking. Also useful when you need high turns count for high choking with large cable - works on large gauge DC power cables.
Note: put both positive and negative cables TOGETHER through the filter so that their differential currents cancel but their common mode currentsare suppressed.