In Vermont the low antenna was due to both a nearby mountain and sloping ground in front of the antenna. To figure the optimum antenna height, ignore tvfool and use trial and error only. If you want to calculate the optimum height, you'll need to delve into ray tracing formulas like the ones used to design the stealth fighter. I used software written by Dean Straw (YT) to lend a hand to Pete in Vermont.
If you are comfortable using a spectrum analyzer, take a look at this one for $10.00
http://www.highdefforum.com/local-hd...r-10-00-a.html
The downside is that DSP based spectrum analyzers take a while to sweep the band. You could try to find an old converter box with built-in signal strength meter. Mine just happens to run on 12 volts.