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If it's using used a 50 Ohm coaxial transmission line, the main problem in constructing a 1:1 current balun using bifilar windings is that you have to get the impedance of the transmission line formed by the two parallel wires exactly correct
post 01 Nov 2023
Toroid & balun Links →
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
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
209
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
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
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
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
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