FT400-3I, ID=3", RFI Range 1-300 MHz, Case of 25
Product Details
RFI Range (MHz): 1-300 MHz
ID-B (in/mm): 3/76.2
OD-A (in/mm): 4/101.6
Height-C (in/mm): 1/25.4
Weight (oz/gm): 420
Initial permeability: 1500
(4″ OD, 3″ ID hole), available in mix 31 only, Case of 25
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 AC or DC power lines and also coax cable lines.
50 ohm coax to 75 ohm balanced output baluns are useful for low (< 1 wavelength) dipoles exhibiting 75 ohm characteristic impedance or for matching to balanced ladder line whose endpoint impedance is near 75 ohms.
50 ohm coax to 75 ohm CATV coax connections are easily done with a 1.5:1 unun with SO-239 connectors on input and output. Likewise 50 ohm coax to unbalanced verticals or loads near 75 ohms can be matched with a 1.5:1 unun.