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Above the Peak of the Roof in such a manner that reception is not , obstructed , impeded , blocked , in All Directions.
Install a.
http://www.antennacraft.net.
HBU11K antenna.
Aimthe HBU11K antenna at about 300 degree magnetic compass direction.
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Here is how to aim antennas.
http://www.kyes.com/antenna/pointing/pointing.html.
Use a Real and Actual magnetic compass to aim antenna , do not trust a , cell phone , tablet and etc. compass.
Also to assist in obtaining the Best Reception most Digital Tv's have a Signal Strength Meter and some Digital Tv's also have a Signal Quality Meter.
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Install a.
http://www.antennacraft.net.
10G201 preamplifier.
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If the signal is split 2 or more ways.
Use a , Holland Electronics , HFS-2D , 2 way splitter.
Use a , Holland Electronics , HFS-3D , 3 way splitter.
Use a , Holland Electronics , HFS-4D , 4 way splitter.
http://www.hollandelectronics.com.
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Here are some alternatives to the HD HomeRun at some or all locations in the building.
http://www.epvision.com.
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Here are some places to buy antennas and etc. in Canada.
http://www.saveandreplay.com.
http://www.trentondistributors.com.
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Know this.
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 , attic , roof , building.
Some and not all Negative Effects are.
Absorbing and Blocking Reception.
Multi-Path Reflecting Tv Signals Bouncing All Around.
The Best Practice for Reliable Reception is to install the antenna at a location that has the least amount to no amount of obstructions of any type or kind in the directions of reception including your own , attic , roof , building.