Making 1 to 4 Balun for Matching Impedance

Here's the way to match 75 Ohm to 300 Ohm impedance. In case of making balun for 200-300 Ohm folded dipole antenna to 75 Ohm transmission cable.

Please see table on image above to determine velocity factor for different cable type.

Please check out my 4 Watt FM transmitter!