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Install the VU190 antenna Above The Peak Of The Roof in such a manner that the Roofs and Buildings are not , obstructing , impeding , blocking , reception in the directions of , South East , South West , West North West , North.
Aim the VU190 antenna at about 244 degree magnetic compass direction.
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 the compass in a cell phone.
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The coaxes and splitter situation Must Be Corrected.
Questionable and Defective Coaxes must be Replaced with Good and Correct Coaxes.
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For 1 Tv location connected use No splitter.
For 2 Tv locations connected use a 2 way splitter.
For 3 Tv locations connected use a 3 way splitter.
For 4 Tv locations connected use a 4 way splitter.
Run a coax from the splitter to each Tv location.
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Install a , Winegard , LNA-100 Boost amplifier , Before any splitter.
The LNA-100 is installed between the antenna and splitter.
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Here are some above the roof antenna mounts.
http://www.ronard.com/909911.html.
Use the , ronard(911) , 5 foot tripod antenna mount.
http://www.ronard.com/34424560.html.
http://www.ronard.com/ychim.html.
Measure around the chimney and use a , ronard(2212) , ronard(2218) , ronard(2224) .
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Here are some places to buy antennas and etc. .
http://www.amazon.com.
http://www.ronard.com.
http://www.winegarddirect.com.
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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 Practice for Reliable Reception is to install the VU190 antenna at a location that has the least amount to no amount of obstructions of any type or kind in the directions of reception.
South East , South West , West North West , North.
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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.
http://www.wchstv.com/DoubleReScanAlert.pdf