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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 16 Dec 2021


Toroid & balun Links

213



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

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

One balun for 40-80-160 meter, OE7OPJ
Amidon FT 140-77 for 40/80/160m, and amidon FT140-43 for 20-6m - multi trasformer 4:1 - 9:1 - 16:1

10 m| 12 m| 15 m|
17 m 20 m| 2 m|
23 cm| 30 m| 40 m
6 m| 70 cm| 80 m| 160 m| 136 khz
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