Friday, December 17, 2010

Gray-Hoverman home built UHF TV antenna.

This is my home built UHF TV antenna. Plans for several variations are readily available with a Google search. I picked this design and used 1.25" EMT electrical conduit from a big box home improvement store for the pole. This was easy to build using PVC lumber. I used two pieces of 1x4". The piece closest to the pole was measured and drilled using a drill press, then the 1/4" aluminum rods were cut to specs and glued in the holes. The heavy copper ground wire was bent on a jig made of screws in a scrap piece of plywood then attached to the second piece of PVC lumber with SS screws and big washers. I soldered the 75 ohm balun directly to the heavy copper wire with a small torch. The design calls for a space of about 4" between he copper antenna and the aluminum reflector rods. This is easily done with 6" carriage bolts. Drill through both PVC boards and the EMT pipe wherever it won't interfere with antenna or reflector and cut pieces of 3/4" pvc water pipe to length for spacers to achieve the total spacing of 4".  Then just tighten the bolts and you have a great antenna! I mounted mine on top of 1.5" steel galvanized water pipe for a total height of 27'. This installation is six miles from Georgia in rural north Florida. This antenna receives seven stations for a total of fifteen channels. It is coupled to an old VHF antenna but the real performer is the UHF home built. It gets Albany Georgia stations at a distance of 49 miles to the transmitter. In the real world this is great reception for UHF in hilly, heavily wooded terrain. We hooked it up and had crystal clear HDTV just in time to watch Florida State University slaughter the Florida Gators. Well worth the effort!

6 comments:

  1. Photos of birds perched on Gray-Hoverman antennas are exceedingly rare on the internet.

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  2. Check out a related build:

    http://j-polegmrsuhfradio462mhz.blogspot.com

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  3. Another build:
    http://uncleikejpole.blogspot.com

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  4. This comment has been removed by the author.

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  5. Check out where this antenna is now! Youtube: http://www.youtube.com/watch?v=bcCD0d4FQR0

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