The use of a line output transformer core to make a balun.
Updated: Apr 25
Be careful when removing the core as it is very fragile!
10 windings were made both top and bottom.
They behave like 100 ohm transmission lines.
Input parallel = 50 Ohms.
Output series = 200 Ohms.
Due to the good low frequency behavior and the capacitive behavior at high frequencies, I have decided to reduce the number of windings from 10 to 7.