Update and Clarify information and typos. Date 05-23-2013.
ALL of the Digital Tv channels in the , Green , Yellow , Red , reception zones are UHF channels in the UHF channel band of 14 thru 51.
Except for receivable VHF high band channels of 9 and 11.
There are no receivable VHF low band channels of 2 thru 6.
That being the case , A UHF only antenna is what is used to receive the Digital Tv stations/channels in the directions of , North , South West , South , South East , East.
KDKA-DT REAL Digital UHF 25 , virtual number (2.1) CBS.
Is in fact transmitting on UHF channel 25 , not 02.
http://en.wikipedia.org/wiki/KDKA-TV.
Tvfool lists the -> Real channel of transmission and reception.
and the virtual number.
And install a Antennas Direct C5 VHF antenna aimed at about 155 degree magnetic compass direction for reception of WTOV 9 NBC and WPCW 11 The CW.
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The Antennas Direct C5 VHF antenna comes with a Diplexer/Combiner to connect the C5 and DB8 antenna together on to one coax.
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Above the roof install a Antennas Direct DB8.
And Antennas Direct C5 antenna.
Try reception with no preamp , with 1 Tv connected.
If a amplifier is required for reception of KDKA , install a Antennas Direct CPA-19 preamp to the output of the combiner.
The DB8 is connected to the UHF connection of the diplexer/combiner.
The C5 is connected to the VHF connection of the diplexer/combiner.
The remaining connection of the combiner is connected to the CPA-19 preamp.
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Remove the reflector screens from the DB8 and the DB8 will receive in 2 directions , at the front of the antenna and the back of the antenna.
Aim either side of the DB8 with the reflector screens removed , at about 135 degree magnetic compass direction.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Here are some above the roof 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