Quote:
Originally Posted by ADTech
You must be in a terrain "hole" to have numbers that low at those modest distances in central Florida.
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Yes, indeed I'm in a little ditch here but I agree with those distances I was not expecting to be in the "impossible" category given newer technology that may be able to assist.
Quote:
Originally Posted by timgr
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.
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Yes, getting to 50ft is definitely going to be something probably not worth doing even with a gauratee. The peek of my roof is about 30 AGL where I can probably get an antenna into the attic around that height.