For the reception of the digital tv channels in the green zone of radar map and some of the channels in the yellow zone of radar map. Install a ANT751 antenna in the attic aimed at about 244 degree magnetic compass. Yes it is Ok to put the antenna in the attic. . If you will like to receive more tv stations/channels , mount the ANT751 on the roof aimed at about 244 degree magnetic compass. Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html. Home Depot may have the ANT751 , Home Depot has RG-6 coax and etc.. Here are more places to buy antennas and etc. ,
http://www.solidsignal.com ,
http://www.amazon.com. Here are roof antenna mounts ,
http://www.ronard.com/909911.html ,
http://www.ronard.com/34424560.html ,
http://www.ronard.com/ychim.html.