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.
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.
Measure 50 5/16 inches from the soldered connection, and cut the twin-lead to this length.
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.
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.
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.
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.
Cut a small hole in the insulation at the top of the antenna, and tie a loop of twine here.
Hang the antenna from the twine. Connect the free end of the coaxial cable to the external antenna jack of your TV.
Weatherproof your antenna by mounting it in a length of PVC tube, capping both ends.
Tips and warnings
- Weatherproof your antenna by mounting it in a length of PVC tube, capping both ends.
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