First post, although I've been lurking for a while. Lots of interesting information, thanks to all!
I've been hoping that KVIE on channel 9, from Walnut Grove, would be usable here in Redwood City. This would give me PBS in HD ... Sutro is no go from my location, which is right behind a steep rise.
I put up a dipole on the roof, cut to 189 MHz, and can get KXTV on channel 10, a solid signal with no dropouts. But KVIE doesn't lock, although I do see the signal on my spectrum analyzer, about 10 dB weaker than KXTV.
Is KVIE is running on low power, or maybe a temporary antenna?
I suppose the answer is to get a 'proper' antenna, rather than the dipole, but I'm curious about the apparent difference in received signal power.