Blast From the Past: Using an Antenna to Grab Free TV
Eyeball any possible line-of-sight obstructions. A hill between your television install location and the masts will reduce range, as will a large building plonked in the path. Interference can be prevalent with certain construction materials -- concrete structures are full of rebar, which can affect radio waves. Glass is less of an obstruction than walls like brick or framed timber.
06/21/12 5:00 AM PT
Bombarded by ads for cable and satellite TV packages, or seductive programming bundles offered by Internet service providers and phone companies, it may be easy to forget that it's possible to pick up much of that programming via a sub-hundred dollar indoor antenna reminiscent of the rabbit-ear days.
If you live in a town, conurbation, or a rural area in the U.S. that's relatively flat, you may be able to receive full-resolution, high definition (HD) antenna-based live programming with an indoor antenna and not bother about subscription-based sources. The uncompressed quality can be better than capacity-restricted, pipe-based offerings.
Classic broadcast networks like ABC, CBS and NBC can still be plucked out of the air, as can local independents. You can also access newer networks like the CBS and Warner owned CW, and Fox; Spanish language broadcast networks like Telemundo; educational programming on PBS; and religious broadcasting.
Considerations as to whether you can receive signals include those related to topography and distance from the transmitting mast. Distance, which affects signal strength; reflecting structures and obstructions define the type of antenna that you need.
Although the website is designed for outdoor antenna selection, you can use the data to determine whether you can likely use an indoor antenna or not.
The website results include mileage to broadcast mast and let you determine the channels that you can conceivably receive.
Enter your U.S. ZIP code, street address and whether the antenna height will be more than 30 feet above ground level in the website wizard. Reckon each floor on an average house is 8 feet high when answering this question.
Press the "Submit" button and the results page will display broadcast stations that you can get, as well as outdoor antenna types using a color-code system.
Addresses where terrain and distances to the broadcast masts mean signals are unavailable will be indicated as such. In that case, you'll need to retain cable, satellite or Internet-based solutions.
Look for the yellow color-coded outdoor antenna types in the chart and cross-reference with listed stations. The yellow color code indicates you can use small outdoor multidirectional antennas, and it's a good bet that you will likely be able to use an indoor antenna too.
Green, light green, red and blue color codes are progressively trickier, and are less likely to work with an indoor antenna.
Check the distance-to-mast mileage displayed on the results. Here's a rule of thumb, courtesy of Russ, from his useful HDTVTunerInfo website: If your television is within 20 miles from the broadcast masts, you should be able to use an indoor antenna.
In my case, I'm 17 miles from the masts on Mount Wilson near Los Angeles, and I use an indoor antenna successfully to receive programming. My previous home was 32 miles, in a canyon, and I couldn't pick up any broadcast television signals.
Expect similar results.
Try rabbit ears first if you have them lying around. If you're close by the masts -- within a few miles -- you can try rabbit ears, or anything else that fits the coaxial cable. Results will be different for AntennaWeb-listed VHF and UHF stations.
Purchase an antenna if your results from the previous paragraph are unacceptable.
Remember that the idea is to drop cable or satellite and realize considerable cost savings, so it doesn't really matter what you spend on the antenna. You will make the money back in the first month if your experiment is successful.
Look for adjectives on the packaging like "long range," where more miles listed are better; and "dBi gain," where higher numbers are better. This is important the further you are from the masts.
Test Your Install
Plug the antenna into the antenna port on the television and test by setting any "Channel," or similarly labeled television option to "Air" rather than "Cable," and scanning for channels by choosing "Auto Scan" on the television, or similar.
Retain the packaging and receipt, and keep upgrading if results are poor.
Tip: Rescan every time you make a change, like antenna position. Both directional, and omnidirectional antennas are affected by position, so do make multiple changes and test.
A Few Caveats
Eyeball any possible line-of-sight obstructions. A hill between your television install location and the masts will reduce range, as will a large building plonked in the path.
Interference can be prevalent with certain construction materials -- concrete structures are full of rebar, an internal metal grid-like structure that can affect radio waves.
Glass is less of an obstruction than walls like brick or framed timber. So, locate the antenna on the broadcast side of the house next to a window. The maps from AntennaWeb will graphically show you where the broadcast towers are in relation to your home.
Signal loss can occur with cable lengths and splitters. Move the television close to the window and antenna instead.
Try both amplified and non-amplified antenna settings if the antenna has amplification options.
Reflections can sometimes work in your favor. Signals can bounce off hillsides and buildings, so it's worth moving the antenna around while testing. You may pick up a reflected signal.
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