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The inside of buildings and attics Are Not a reception friendly environment and Never Will Be a reception friendly environment.
Install the , ANT751 antenna , in/at , a window that faces ~ East South East or out on a patio that is ~ East South East.
Aim the ANT751 antenna at about 138 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 a , cell phone , tablet and etc. compass.
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.