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shortspaced stations

Schroedingers Cat said:
recnet has the 70, 60, 50, and 40 dBu if you go to the advanced map. But especially in a place like LA, you should try fmfool or some similar type of Longley Rice approximation.
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Wasn't going to go to that much trouble, considering that the question didn't need a complicated answer. But you are certainly on the mark with your suggestions if it was something like figuring out where to mount a receiving antenna on a house or some such thing.
 
Yeah, that's what I would think, but I didn't even notice KPWR until the next morning, even having DXed from the same location the night before. KPWR was very weak, much weaker than even a lot of the San Bernardino signals.
 
bobdavcav said:
Yeah, that's what I would think, but I didn't even notice KPWR until the next morning, even having DXed from the same location the night before. KPWR was very weak, much weaker than even a lot of the San Bernardino signals.
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KPWR has three licensed auxiliary facilities, all of which are licensed for the same wattage but considerably lower elevation in the hills above Glendale. If they happened to be on one of the aux transmitters when you were DXing that would explain not hearing it in Anaheim.

Again, just guesses on my part.
 
What is the station in the San Diego area that has several on channel boosters? In most areas, you want to have a small ERP (like several watts and polarization opposite from the residual signal in the terrain hole) for the booster to fill a small, deep terrain hole, because once you are back in the line of sight, you get interference fringes, which causes many stations in less mountainous areas to give up on them. The fringes are particularly bad with less hilly areas and higher ERP, which can be 20% of the ERP of the main station.
 
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I've started to reconstruct Section 73.213 in Miles. Even when you calculate the km to miles conversion, there is rounding error, so you have to remember that almost all the spacings were originally in intervals of 5 or 10. Also, there is the difference between rounding miles and rounding km. km allows less rounding reduction than miles. But once you see more of it, you'll see why certain towers ended up where the are to get into the highest ERP zone. And you'll see why so many stations were short spaced with good ERP levels.
 
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