DIY BalUn

This page is for the DIY Balun project.

Parts List:

• 1x FT-240 Ferrite Core
• ~10 ft Magnet Wire
• 4x M3x10 Screws
• 6x M6x20 Screws
• 4x M3 7mm washers
• 10x M6 12mm washers
• 2x M3 wire nut
• 2x M6 wing nut
• 8x M6 nut
• 1x Eye Bolt
• 1x SO-239 Panel Mount

Construction Instructions:

• Bolt panel-mount into box, placing a wire nut on the most accessible screw
• Bolt in both positive and negative antenna connection points in the following stack: Screw -> Wire Nut -> Washer -> Balun Case -> Washer -> Nut -> Washer -> Wire Nut -> Washer -> Wing Nut
• Bolt in Eye bolt in the following stack: Nut -> washer -> Balun Case -> Washer -> Nut

Notes: This design is a type-agnostic feedpoint. It will work for any antenna design fed by 50 ohm coax. Printed in ASA, it should be fairly weather-resistant too. Use as much stainless steel hardware as possible for maximum weather resistance.