I changed the preamp to the Channel Master CM7777 preamp.
For reception of.
KSBY-DT UHF digital channel 15 , NBC and The CW.
K16FC-D UHF digital channel 16 , Community Educational Television.
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And maybe , KKFX-CA UHF digital channel 24 , FOX.
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Install above the roof or some where in the clear a Winegard HD9095P antenna with a Channel Master CM7777 preamp.
Aimed at about 145 degree magnetic compass direction.
Going higher then 25 feet antenna height does not improve signal strengths.
15 to 25 feet will be fine.
The main point is , trees and tree leaves and buildings and attics and other obstructions are to be avoided for reception in the direction of about 145 degree magnetic compass.
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Install the preamp close to the antenna and the power supply/power injector before any splitters.
Connect a 2 way splitter to the pre amplified power supply/power injector output.
One output of the 2 way splitter will be connected to the longest run of coax cable.
The other output of the 2 way splitter is connected to a 4 way splitter that then connects to the other 4 Tv's.
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Here are some 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.winegarddirect.com ,
http://www.amazon.com ,
http://www.channelmasterstore.com.