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Attics and the inside of buildings Are Not a reception friendly environment and Never Will BE a reception friendly environment.
So that The DB4e has the best possible reception location without the obstructions and Interference of the roof and building.
I recommend to reduce confusion install the DB4e , as the DB4e original came , without the add on parts of the CS2V ""reflector"".
I Recommend install the the DB4e - Above the Peak of the Roof - in and of - such a manner that the roof and building and chimney/s and etc. , are not , obstructing , impeding , interfering , blocking , reception to the , North West , West , South West.
As much as possible , locate the DB4e , that is above the roof , away from the trees and other obstructions to the , North West , West , South West.
Aim the DB4e at about 280 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.
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As a test to find the best reception with/by antenna aim and antenna location above the roof.
Connect a New Continues length of RG6 coax with the Compression type connectors on the ends of the coax , Run the coax from the DB4e antenna through a open door or window , direct , to 1 Tv.
Most Digital Tv's have a Signal Strength Meter and some Digital Tv's also have a Signal Quality Meter , to use to adjust the DB4e antenna for best reception.
Do not have any parts of a signal amplifier connected.
No splitters.
No coax grounding couplers.
No etc. .
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It is the DB4e antenna connected to the Continues length of coax direct to 1 Tv.
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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/DoubleReScanAlert.pdf.
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What is reception like now??