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The CM5016 antenna is designed for local strong signal strength reception.
Your reception location is Weak to Weaker signal strengths in the Yellow and Red reception zones.
Yes install the preamplifier , the preamp will be operated in the Combined antenna mode because only one antenna is connected.
The FM trap of the preamp will be in the , in/on position.
Aim the antenna at about 21 degree magnetic compass direction.
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Remove the CM5016 antenna.
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And Yes also test reception the HDB8X aimed at about 21 degree magnetic compass direction with the preamp connect to the HDB8X and the preamp.
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Here is how to aim antenna ,
http://www.kyes.com/antenna/pointing/pointing.html.
Use a Real and Actual magnetic compass to aim antenna , do not trust a cell phone compass.
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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 in the direction of reception , North East.
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 direction of reception including your own roof and building in the direction of reception , North East.
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The Tvfool channel list under the word Real , shows the Real channels that are Transmitted and Received.
Under the (virt) is the virtual numbers , virtual numbers are not a real channel , even if the virtual number is the same as the real channel.
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Your reception location has receivable channels in all 3 Tv bands.
VHF low band channels 2 thru 6.
VHF high band channels 7 thru 13.
UHF band channels 14 thru 51.
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The CM5016 antenna is a All Tv band antenna but is to small for the weak channels reception situation.
The preamp will help and might make the Weak channels reliable.
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The HDB8X is a UHF channels design antenna.
WTVF , CBS , is transmitting on , VHF low band channel 5 , and is transmitting on UHF channel 25.
So the HDB8X antenna will receive WTVF Ok.
That leaves , WNPT-DT , VHF high band channel 8 , PBS.
The HDB8X might do Ok at receiving channel 8 , with the preramp installed.
The HDB8X antenna will do good at receiving those Weak signal strength UHF Tv Stations/Channels in the Red reception zone.
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If channel 8 is not received reliably with the HDB8X antenna.
Then install a ,
www.antennacraft.net , Y10-7-13 , VHF high band channels 7 thru 13 antenna.
The RCA preamp will be operated in the Separate antenna mode.
The HDB8X is connected to the UHF connection of the preamp.
The Y10-7-13 is connected to the VHF connection of the preamp.
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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/DoubleReSacanAlert.pdf
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Here are some places to buy antennas and etc. .
www.amazon.com
www.antennacraft.net