|
Ok, 10 & 12 are VHF high, and the most sensitive readily available antenna for that band is a Antennacraft Y10713. It has about a 9 dB gain, so add that to the noise margin of the channel at each height, and then subtract some for the tuner, preamp and cable losses, say 6 dB? Those stations may become reachable at 50 ft, at 6.9 and 4.0 resp. Your Y5713 is about 6dB IIRC, which is half the power gain of a Y10713.
Ch 28 doesn't change much with 50' height, staying impossibly weak at -18 dB NM (still tropospheric, ie badly obstructed from your location).
There's no guarantee that 50' and a Y10713 would bring in those two stations, but I'd try it if I could get up that high. They are close enough that you'd probably get both of them.
NB I'm an engineer and have been playing along here for a while, but not in the industry... hopefully one of the industry people will correct me if needed.
|