[mhouston]

I have a Channel Master (CM-4228HD) 8 Bay HD antenna Designed for UHF/VHF reception from 174 to 216 MHz and 470 to 700 MHz chimney mount over the top of the chimney at approximately 25 feet above grade. I currently have it mounted stationary at 85 degrees. I have a preamplifier Winegard PS1403 Power Injector / Inserter for Pre-amp 18 Volt (PS-1403). From the antenna to the amp is approximately 25 feet I have a splitter to feed the main TV and another TV hooked up via coax approximately 40 feet.
My problem is the consistency of the tv reception. At times I can get 42 digital channels which come in very well at other times poor or no signal at all.
What is confusing is like last Sunday I wanted to watch NFL Football on channel 14.1 and the signal came and went. It seems that channel 7.1 remained constant which has the same transmitter. At times I can get channel WRAL 5.1 other times not consistently or not at all.
I want to drop satellite but I want to get a more consistent signal. What steps should I take? I am not sure since it comes and goes if it could be wind. This is an omnidirectional antenna would the strength improve with a Antenna Rotator System? I really like the signal when it comes in but it is aggravating when watching a football play and it comes in and out.Any help is appreciated.