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I am in a condo on ground floor, on a street full of apartment/condos in Fort Lauderdale. I have a RCA Indoor HDTV Antenna - Model: ANT1400 (can't find that number, on the back it says 1245GM but that's what Best Buy shows), hanging from curtain rod in front of south window. One day I can get channel 2, 4(s), 6 & maybe a couple of 19's. Then the next day none of those, but 7, 29's 45s, etc. Almost all the time I can get 69-2, which is closer, in Hollywood, so due south.
This results in several channels with reception too splotchy to tolerate and only 4 or 5 at any one time that are usable, one or two VHF and a few UHF. Sometimes I can go stand at the tv and put my hand on the coax cable and move it around and reception will change enough for me to see the rest of the show I was watching, but I never know when a particular channel will just be GONE for days. It doesn't matter which tv I use. A whole bunch will tune in on the tuner, but only a few can be watched. So one day I can watch ABC, then it's gone for a week and I'm seeing CBC, but no ABC or NBC. I can never watch all three!
My biggest, newest tv has this function where it will do a partial scan to "add" channels, but when it does, it will take away the ones I'm watching now and give me a different set.
I also have a KCPT DT504 tuner the owner bought for an old television. It doesn't change my experience, but it provides additional information, it has a "signal" feature. The signal "strength" on the channels will be consistant between high 20's to high 30s, but the signal "quality" on stations impossible to watch will jump around constantly from 100% to 35% to 70% to 21%, etc. Often channels just go blank and display "no signal".
I'm a ham radio operator for years, though never did too much with antennas. But I do understand how they work. My first assumption was that this antenna (owner bought it, not me) only tunes in a narrow spectrum of channels, which changes with the slightest tiny rotation of its plane. But the material on these kind of antenna claims they tune the entire VHF/UHF band range. And, that still would not explain how it can change so DRASTICALLY without me ever getting within 20 feet of it, much less moving it.
I've searched the internet for a description of this problem and can't find it. Has anyone else had this issue?
Is it interference, bad antenna, type of antenna, or what?
Is there any point in me going on a wild goose chase trying out all different kinds of antennas? I really don't want to get into that trap. I just want to see the local news...