Originally Posted by Jackyl16
Hi All...I am hoping someone can help help. I cut the cord about 6 months ago and LOVE it, (I use a Roku box for streaming) and a OTA Antenna for local channels. I installed a Antennacraft® AC9 VHF/UHF/FM HDTV Antenna from Radio Shack. I receive every single channel except channel 61. I am in Tempe (48th Street and Baseline area) and according to antennaweb.org the tower is 6 miles away on South Mountain. What gets me, is that Channel 3 comes in crystal clear (and of course all the Trinity and Spanish channels). CW is the only one I can not receive. It says it is at a 236 degree direction. My antenna is at that on the dot. Is it just a cheap antenna? Oh, it is a single story house, mounted on the side of the house with a 10 foot mass. Should I increase the mass to 20 feet or should I just get a new antenna? Any suggestion on what type of antenna I should get? The two TV's I have are digital TV's, so, no external box for the digital portion.
From your location you should not necessarily
need a better antenna; you have line of sight and are very close. There certainly is enough signal level there, although signal level does not paint the whole picture for reception of DTV.
We must assume that you have done channel scans on both sets. How old are they? The newer the better the tuners are.
It is a small possibility that you have too much signal. This can be checked by putting an inexpensive 2-way or 4-way splitter in the line to attenuate the signal 4-8 dB (be sure it is rated to at least 600 MHz). You could even buy a splitter or attenuator from RatShack and take it back if it doesn't help. Not a likely fix, but the easiest to do; you might as well eliminate that possibility.
The larger possibility is that you are in a destructive interference node for the particular frequency that CW is on (can't recall--is it 49? Try tuning 49 directly). This happens when the signal bounces off of an object and reaches the antenna out of phase with the direct signal, effectively canceling it out. THis phenomenon is frequency-dependent, which is why it can affect one channel and leave the others untouched (they may have nodes at other locations).
The good news there is you normally only have to move the antenna 6-12 feet in any direction to move out of the node. If you can see S. Mt. from the ground, you could actually "war drive" the property and walk around with a long lead from the antenna while you hold it pointing to S Mt and have it connected to the TV while tuned to that channel. A helper talking to you on your cell phone can make this work better. If you have line of sight, height should not be an issue (and a taller mast will likely not help, but that is also one other way of moving out of the node.)
If that doesn't work you could try other locations on the roof (be careful--falls and electrocution are a reality; we want to keep you safe).
If none of that works you may just have a lot of multipath interference at your location, and that would indeed take a better antenna. The one I recommend is the Channel Master 4228HD which is a small but very directional and powerful antenna. It is a UHF-only antenna, about $60, but it also can receive the upper VHF band fairly well (you need that for 8, 10, and 12).
The antenna you have is average, and this one is about as good as it gets, spec-wise, which I can also attest to firsthand; we have one in a very reflection-rich environment in urban Phoenix and it works like a champ. Just remember that a better antenna is not a guarantee of better reception for your particular issue. Be sure you can return the antenna if you want to minimize the risk, although if you can't return it you can at least know you are getting better reception on everything else, which can mean more reliability on the channels you do get.