The tvfool report says the report is made to zip code only.
Based on the zip code only.
New York City is to the south west.
The groups of Tv stations are at about 240 degree magnetic compass (south west).
For reception in the attic , install a Winegard HD7084P , no amplifier , aimed at about 240 degree magnetic compass (south west).
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.
For coax , use standard RG-6 coax , quad shield RG-6 coax is not required.
Here are place to buy antennas and etc. ,
http://www.soldsignal.com ,
http://www.winegarddirect.com ,
http://www.amazon.com.
The best way to find out if the ham radio is a situation or not is install the Tv antenna tune in the Tv channels and see what happens.
I say there will not be a issue or situation.