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Long Wire Balun

I needed about 60 cm wire 1 mm to be able to have 11 turns around the iron powder core
post 17 Dec 2021


Toroid & balun Links

213



4 to 1 balun
This balun was made with two ferrite cores, Jaycar LF1258)wired using Cat 5 UTP wire. The winding ratio is 6 turns to 12 turns. 50 ohm primary is 6 turns. The 200 ohm secondary is formed by adding 3 turns to either end, giving 12 turns overal

6:1 Voltage Balun
Requiring a balun to feed a balanced antenna from an un-balanced load with a impedance step up from 50ohms to 300ohms, a 1:6

9:1 transformer
A balanced antenna from an un-balanced load with a impedance step up from 50ohms to 300ohms, a 1:6 Voltage balun design using two L15 ferrite toroid cores was selected

A 9:1 Balun For Your End Fed Antenna
unun transformer unbalanced to unbalanced. The raw End-Fed antenna will go through impedance swings as high as 5K Ohms,or more, at even multiples of its 1/4 wavelength design frequency

9 to 1 balun
This balun was made with single ferrite core, Jaycar L01234) wired using single strand Cat 5 UTP wire. The winding ratio is 6 turns to 18 turns. 50 ohm primary is 3 x 6 turns, wired in parallel. The 450 ohm secondary is formed by winding 2 x 9 turns in series

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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