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The first 10 Tv stations signal strengths are so strong signal they are Highlighted With Red.
And are Over The Top Strong Signal Strength.
And are less then 1 mile away.
DO NOT use any type or kind of amplified antenna , DO NOT use any type or kind of add on antenna system amplifier.
DO NOT use a amplifier.
The amplifier Will Over Load from the Over The Top Strong Signal Strengths of Tv stations , and the over loaded amplifier Will Be The Cause of bad reception of some channels.
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For a indoor type antenna use a , Terk HDTVi , Non amplified antenna.
Aim the HDTVi antenna at about 159 degree magnetic compass direction.
Here is how to aim indoor and outdoor antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
For a above the roof type antenna use a
http://www.antennacraft.net , HBU11 antenna.
Aim the HBU11 antenna at about 159 degree magnetic compass direction.
Digital Broadcast Tv Tuners can develop - Digital Glitches - that are not cleared out with simple channel scans.
To clear tuner , do Double Rescan.
http://www.wchstv.com/Double ReScanAlert.pdf.
For your reception situation , Tv stations might be received even with no antenna connected , Because The Tv Transmissions Are So Strong.
If that is the case , then take the Tv several miles away so that the signals are weaker.
Do the Double Rescan up to and including the no antenna connected part of the Double Rescan , and then take the Tv back to the location where the reception is to take place and happen , and connect the antenna to the Tv and scan for channels.
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Here are some places to buy antennas and etc. .
http://www.solidsignal.com.
http://www.amazon.com.
http://www.antennacraft.net.