Hi, Harold:
Probably not for 100% reliable reception under all conditions, but it has been done at times because the tvfool report is only a computer simulation. If you are willing to take a gamble, go for it. You can see how the signal runs out of energy by the time it reaches your location. It is in your favor that you are in the "wide open spaces."
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What rooftop at 27 height would work?
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You would need to go to 200 ft to get your K30JP NM up to -10.2:
http://www.tvfool.com/?option=com_wr...f1f051db74fc37
and up to 400 ft to get it up to +1.4 dB:
http://www.tvfool.com/?option=com_wr...f1f06b12a09a2f
A Noise Margin of zero is the weakest signal that can be received. You can add your antenna gain of about 13 dB, which brings the NM up to +1.9 dB. You can also add your preamp gain, but you must subtract its noise figure (NF), because its internal noise reduces the SNR (Signal to Noise Ratio) of the signal. This should give you enough gain to overcome the coax loss and will improve the system noise figure.
Disclaimer: I can't guarantee that this will work; you are on your own. I never want to discourage anyone from doing antenna experiments. I always learn something from my antenna experiments, especially the ones that don't work because I have to figure out why they didn't.
Interpreting Noise Margin in the TV Fool Report
http://www.aa6g.org/DTV/Reception/tvfool_nm.html
