Homemade Omni Directional TV Antenna Design

Written by adam quinn
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Homemade Omni Directional TV Antenna Design
Expand your channel selection with an omnidirectional TV antenna . (television fast moving image by tezzstock from Fotolia.com)

An omnidirectional TV antenna can expand the number of over-the-air channels you receive in your area. This antenna design optimises television reception by tuning into broadcasts from all directions. You will need a digital converter box or a digital-ready TV to receive over-the-air programming, as of the 2009 digital transition. Build an omnidirectional antenna and receive local digital TV channels.

Skill level:
Moderately Easy

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Things you need

  • Twin-lead cable, 300 Ohm, 5 feet long
  • Coaxial cable, 75 Ohm, 12 feet long with connectors
  • Soldering iron and solder
  • Wire-stripping tool
  • Utility knife
  • Electrical tape
  • Small piece of twine

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Instructions

  1. 1

    Strip 1/2 inch of insulation from the end of the twin-lead cable. Twist the wires together, and secure the connection with solder. This will be the bottom of the antenna.

  2. 2

    Measure 50 5/16 inches from the soldered connection, and cut the twin-lead to this length.

  3. 3

    Measure 16 3/4 inches from the soldered wires, and cut a 1/4-inch gap from the right side of the twin-lead cable. Remove the insulation and the wire.

  4. 4

    Measure 1 1/4 inches from the soldered wires, and strip 1/4 inch of insulation from both sides of the twin-lead. Remove the insulation only, leaving the wires intact. These will be the contact points for the feed line.

  5. 5

    Cut the connector from one end of the coaxial cable. Strip 1/2 inch of insulation from the cable end. Slice down the side of the braided insulation, and twist the braid into a wire. Remove 1/4 inch of plastic insulation from the inner copper wire.

  6. 6

    Solder the coaxial twisted braid to the exposed twin-lead wire, on the side with the 1/4-inch gap. Solder the coaxial copper wire to the opposite exposed wire. Wrap electrical tape around the connections to protect the solder joints.

  7. 7

    Cut a small hole in the insulation at the top of the antenna, and tie a loop of twine here.

  8. 8

    Hang the antenna from the twine. Connect the free end of the coaxial cable to the external antenna jack of your TV.

Tips and warnings

  • Weatherproof your antenna by mounting it in a length of PVC tube, capping both ends.

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