Attics Are Not a reception friendly environment and Never Will be a reception friendly environment.
Yes you can start with a ANT751 in the attic.
Aim the antenna at about 184 degree magnetic compass direction.
If there are reception issues with the Current Plus Pending Applications Digital Tv stations/channels in the Green and Yellow reception zones of the tvfool radar plot and channel list.
Then.
Above the roof install a ANT751 antenna aimed at 184 degree magnetic compass direction.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
For 1 Tv connected use no splitter. No preamplifier.
For 2 Tv's connected use a common simple 2 way splitter. No preamplifier.
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Do Not chain splitters one after the other , one splitter connected to another splitter connected to another splitter , connected to another splitter.
Every time a split takes place the signal strength is reduced , at the end of the chain of splitters there is little signal strength.
The correct way is for 1 Tv connected use no splitter.
For 2 Tv's connected use a 2 way splitter.
For 3 Tv's connected use a 3 way splitter.
Coax runs go out from each output of the splitter to a Tv location.
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The ANT751 antenna , solidsignal , or , amazon , comes with a J type antenna mount.
Here are some other antenna mounts ,
http://www.ronard.com/909911.html ,
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 etc. ,
http://www.solidsignal.com ,
http://www.amazon.com.
As always , trees and tree leaves do a real fine job of reducing and 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 the least amount to no amount of obstructions of any type or kind in the directions of reception including your own house.
At your location that is , west , south west , south , north east.
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The Tv/s must channel scan for Digital Broadcast Tv Channels , sometimes known as 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.