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Balun 4:1 Para varios tipos de antenas

An antenna of the type T2FD or inverted V as the one published in the previous number has an impedance between 400 and 500
post 20 Sep 2020

Toroid & balun Links


Open Air Choke Balun
impedance long wire from a 50ohm unbalanced coaxial input. With a 9:1 turns ratio, this gives approx. 450ohm output impedance

Transformateur adaptation pour antenne 9:1 balun
To best use a long-wire antenna, the 9: 1 transformer toroid T200-2 red or T200-6 yellow

Magnetic Long Wire UnUn 9:1, M0UKD
These are sometimes known as a Magnetic Longwire Balun. Its really an impedance transformer (9:1)

A 9:1 Balun For Your End Fed Antenna
End-Fed antenna it is wired as a so-called unun transformer unbalanced to unbalanced

Balun 9:1 su toroide
Each antenna has a characteristic impedance that, often, does not fit with that of the drop cables and the inputs of the equipment