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Television - Tech, General, and Q&A
DTV | HDTV Reception and Antenna Discussion
Channel Master CM4221-HD - performance data
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<p>[QUOTE="Rickideemus, post: 122181, member: 12677"]Well, looking over your homework I don't see any stations in the green (NM>34) at 243 degrees, so I think you've set yourself a tough challenge. Have you had antennas working well for you in the attic? If not, it's very hard to predict whether this plan will ever get off the ground. It depends entirely on the building materials in your roof and attic. The pink stations (NM < 15 or so) are <em>probably</em> a lost cause with an attic installation. With that in mind, it looks like WABC RF7 is the most important VHF station for you, so I wouldn't be looking at the 4221HD. 4-bay bowties are generally designed for UHF, and any high VHF tends to come from 10-11-12-13. Don't know about the "new" 4221HD -- if it is new -- if you can get that model -- if it has gain figures specific to frequency. Too many questions there.</p><p></p><p>I have an unusual suggestion. Can you get a small TV up in the attic and test it with a cheap dipole / loop combination? You can get an RCA 111R or equivalent from Walmart for about $10, and we often recommend that as a kind of poor man's signal meter. Idea being, if you can't get <u>anything</u> from the attic, then a stronger antenna isn't going to create signal out of vapors. In other words, if you can't get WHPX RF26 at 33 NM, you won't get anything below 20 NM with the best antenna ever made. You probably won't even get anything below 25 NM, which wipes out 243 degrees completely.</p><p></p><p>If you want further advice, I would plead with you to copy the link that appears toward the top of your TV Fool Report and share that with us. There's a lot of information missing from your copies, and we're just used to dealing with the reports sorted by signal strength (NM). Your exact address is automatically withheld to protect your privacy.</p><p></p><p>Are you aware of any trees or buildings in line-of-sight to 243 degrees? Anything like that would definitely put a crimp in the attic plan. Not kill it, necessarily, but a crimp, for sure.</p><p></p><p>Rick[/QUOTE]</p><p></p>
[QUOTE="Rickideemus, post: 122181, member: 12677"]Well, looking over your homework I don't see any stations in the green (NM>34) at 243 degrees, so I think you've set yourself a tough challenge. Have you had antennas working well for you in the attic? If not, it's very hard to predict whether this plan will ever get off the ground. It depends entirely on the building materials in your roof and attic. The pink stations (NM < 15 or so) are [I]probably[/I] a lost cause with an attic installation. With that in mind, it looks like WABC RF7 is the most important VHF station for you, so I wouldn't be looking at the 4221HD. 4-bay bowties are generally designed for UHF, and any high VHF tends to come from 10-11-12-13. Don't know about the "new" 4221HD -- if it is new -- if you can get that model -- if it has gain figures specific to frequency. Too many questions there. I have an unusual suggestion. Can you get a small TV up in the attic and test it with a cheap dipole / loop combination? You can get an RCA 111R or equivalent from Walmart for about $10, and we often recommend that as a kind of poor man's signal meter. Idea being, if you can't get [U]anything[/U] from the attic, then a stronger antenna isn't going to create signal out of vapors. In other words, if you can't get WHPX RF26 at 33 NM, you won't get anything below 20 NM with the best antenna ever made. You probably won't even get anything below 25 NM, which wipes out 243 degrees completely. If you want further advice, I would plead with you to copy the link that appears toward the top of your TV Fool Report and share that with us. There's a lot of information missing from your copies, and we're just used to dealing with the reports sorted by signal strength (NM). Your exact address is automatically withheld to protect your privacy. Are you aware of any trees or buildings in line-of-sight to 243 degrees? Anything like that would definitely put a crimp in the attic plan. Not kill it, necessarily, but a crimp, for sure. Rick[/QUOTE]
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Channel Master CM4221-HD - performance data
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