Originally Posted by Xn0r
FWIW: I'm in Santa Clara (95054 zip code). I got my HDTV back in November and did a bunch of scanning. I could get everything fine from Sutro and San Bruno mountain. But for whatever reason, I couldn't get KTVU.
I also have Comcast cable, so I can get it via that, so no huge deal, but it bugged me a bit that I couldn't get KTVU and watch my favorite Fox shows if the cable decided to flake out (mine has several times!).
So last night I decided to do another scan to see if anything has changed, and lo-and-behold I can now get KTVU strong/clear. OTA HD looks good!
I'm in a 2nd floor apartment with a Terk HDTVa indoor antenna. Note that I pretty much ignore the analog channels because most a) don't look as good as the digital, and b) don't have as good reception (from "good" to "unwatchable" depending on channel).
Now, from reading this thread, it seems to me that nothing has really changed? So wonder what has caused me to suddenly be able to get KTVU pretty much 5x5? Maybe other things have changed since November? Or changes on other stations/frequencies have had an effect?
Atmospheric conditions, inversion layers, fog, etc. can make a big difference in signal strength. Xn0r, apparently you're seeing improved conditions between you and Sutro Tower so KTVU has come above the cliff edge for you. With analog signals, people didn't notice the changes that much. The picture might get a little more or less snowy, but not enough to make a difference. With digital, your receiver either gets enough signal to detect the 1's and 0's to make a picture or it doesn't... it's perfect or it's gone. I think lots of people are going to be surprised to see how much their signals vary over the course of a few days, a few months, or even longer when they switch to digital.
One thing I can't explain is that when the signals from Walnut Grove (Sacramento-Stockton) are weak, the signals from Mt. Allison and Monument Peak above Fremont are usually good here in San Francisco. When the Walnut Grove signals improve, the ones from the South Bay tend to get weaker. KTEH can get weak enough to drop below the cliff edge when I'm getting several stations from Sacramento. Sometimes KSTS will also drop out. Other times I get signals of 80+ out of them. What's with that?
I've noticed that for the past couple of months the stations from Walnut Grove have overall been a lot weaker than they were during the summer and fall. I used to be able to get several of the stations reliably - 6, 10, 13, 31, 40 and 58 were all there most of the time, but lately only KMAX 31 has been coming in consistently. This afternoon for a while I was getting KVIE 6 and KQCA 46 along with KMAX, but they were gone again later tonight, and even KMAX was breaking up a little.
You guys down in the South Bay, Turbo and Xn0r, might also be close to that infamous cliff edge and you might be seeing the effects of the changing conditions right now.