Attics and the inside of buildings Are Not a reception friendly environment and Never Will Be a reception friendly environment.
The negative effects of , multi-path/reflections signals bouncing all around , absorbing , blocking , Tv reception.
That said , Yes reliable reception can happen in the attic.
However that does not mean that attics and the inside of buildings are a reception friendly environment.
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The signal strengths of the Main Groups of Digital Broadcast Tv stations/channels to the north east are moderate to strong signal strengths.
Yes start with a Winegard HD7696P antenna in the attic aimed at about 66 degree magnetic compass direction.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Try reception without and with the distribution amplifier.
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The antenna , and cable system delivered services cannot be connected onto a same coax at the same time.
Yes the coaxes that are in or on the building can be used for the antenna system , however any cable delivered services can not be connected to those coaxes.
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As always , trees and tree leaves , plants and plant leaves , have a negative effect on reception.
Multi-path/reflection , absorbing , blocking , Tv reception and so do buildings and other obstructions including your own roof and house.
The best practice is to install a antenna at a location that has the least amount to no amount of obstructions of any type or kind in the directions of reception.
The Tv/s Must Channel Scan for the Digital Broadcast Tv stations/channels , often named the 'Air Channels' or 'Antenna Channels' in the Tv Setup Menu because the Tv transmissions travel through the Air from the transmitting antenna to the receiving antenna.
Some Digital Tv's will Automatic channel scan for cable tv channels.
DO NOT channel scan cable tv channels.
Go into the Tv Setup Menu and select , 'Air Channels' ~ 'Aantenna Channels'.
Scan for channels.
