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Above the Peak of the Roof in such a manner that reception is not , obstructed , impeded , blocked , by the roof and building in the directions of , West West North , East South East.
Install a ,
www.antennacraft.net , HBU11K antenna , aimed at about 295 degree magnetic compass direction.
Here is how to aim antennas ,
www.kyes.com/antenna/pointing/pointing.html
Use a Real and Actual magnetic compass to aim antenna.
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No antenna system amplifier is required.
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For 1 Tv connected , use No splitter.
For 2 Tv's connected use a simple common 2 way splitter.
For 3 Tv' connected use a simple common 3 way splitter.
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Here are some places to buy antennas and etc.
www.amazon.com
www.antennacraft.net
http://www.summitsource.com.
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To Prove Reception
Connect a NEW Continues length of coax to the HBU11K antenna and run the NEW Continues length of coax through a open door or window , direct to 1 Tv.
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Digital tuners can develop - Digital Glitches - that are not cleared out with simple channel scans.
To clear tuner do Double Rescan.
www.wchstv.com/DoubleReScanAlert.pdf
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As always , trees and tree leaves , plants and plant leaves , have a Negative Effect on Broadcast Tv Reception and so do buildings and other obstructions including your own roof and building.
Some and not all Negative Effects are.
Absorbing and Blocking Reception.
Multi-Path Reflecting Tv Signals Bouncing All Around.
The Best Pratice is to install the HBU11K antenna at a location that has the least amount to no amount of obstructions of any type or kind in the directions of reception.