It is more accurate and entered many different height numbers. The 5 ft gave me -8.5 nm and. 27 ft is -11. something. The only vhf channels are 12 & 7 display channels and 8, 11 real. Twelve is PBS and available on 19 k19aa less than ten miles at 353 degrees. Seven is ABC at 123 degrees. Another Abc is available 5 k42ib at 333 degrees. The uhf antenna I intend to install is the b91x.
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