Manual 1:4 BalUn 600 Watt for Off center fed antenna (windom antenna)
This Manual for the 1:4 BalUn 600 Watt will help you step by step in building the homebrew kit. If an off center fed antenna (windom antenna) is fed with a coaxial cable from the set it is necessary to use a 1:4 BalUn. BalUn means: Balanced to Unbalanced. As a result, we adapt an unbalanced feed system (coaxial cable) to a balanced antenna system. The characteristic impedance of an off center fed antenna (windom antenna) is about 200 to 300 ohms. The transceiver has an impedance of 50 Ohms, therefore an impedance adjustment must also be made.