As always , attics Are Not a reception friendly environment and Never Will Be a reception friendly environment.
For reception of the listed Digital Tv channels.
Yes you can start with a Antennas Direct DB4e antenna with a Antennas Direct CPA-19 preamp in the attic.
Aim the DB4e at about 114 degree magnetic compass direction , here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
If you are missing the reception of the Weak Digital Tv stations channels , KSHV MyNetwork , KLTS PBS , KPXJ CW and Me-Tv , with the antenna in the attic.
Move the antenna and preamp to above the roof.
The DB4e will be mounted above the roof in such a manner that the roof and house is not blocking reception to the , south east.
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For 1 Tv connected use no splitter.
For 2 Tv's connected use a , HFS-2D , 2 way splitter.
For 3 Tv's connected use a , HFS-3D , 3 way splitter.
Buy the HFS splitters at ,
http://www.hollandelectronics.com , or ,
http://www.solidsignal.com.
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Here are csome antenna mounts for above the roof ,
http://www.ronard.com/909911.com ,
http://www.ronard.com/34424560.html ,
http://www.ronard.com/ychim.html ,
http://www.ronard.com.
Buy the ronard antenna mounts at solidsignal by typing the word ronard in the solidsignal search box.
Here are some places to buy antennas and ect. ,
http://www.solidsignal.com ,
http://www.amazon.com.
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As always trees and tree leaves do a real fine job of reducing or blocking Tv reception and so do buildings and other obstructions including your own house.
It is best to install a antenna at a location that has little to no obstructions of any type or kind in the directions of reception in cluding your own house.
The Tv's Must Channel Scan for the Digital Broadcast Tv Channels , sometimes 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.
DO NOT channel scan for cable tv channels.