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[QUOTE=&quot;DW-77, post: 121996, member: 38055&quot;]I have a particular combination of local and distant stations, that requires a certain antenna radiation pattern (gain variation over the frequency range wold be helpful, too).&nbsp; Based on reviews, the CM4221-HD looks like it might be a good candidate, but I cannot find any credible technical / performance data for it. The manufacturer web page managed to confuse me.<a href="http://www.channelmasterstore.com/Digital_HDTV_Outdoor_TV_Antenna_p/cm-4221hd.htm">4-bay HDTV/UHF Digital Outdoor TV Antenna-Channel Master CM 4221HD (CM4221HD)</a>states:&nbsp; &quot;Designed for UHF/VHF reception from 470 to 700 MHz&quot; and &quot;Antenna Size: 4 x 20 x 36 in&quot;BUT<a href="http://support.channelmaster.com/attachments/token/0l9p6mcidnys3eg/?name=CM4221HD+Data+Sheet.pdf">http://support.channelmaster.com/attachments/token/0l9p6mcidnys3eg/?name=CM4221HD+Data+Sheet.pdf</a>states:&nbsp; &quot;Reception Range Channels 14 thru 69&quot; and &quot;Antenna Size (L x W x H) 5.5 x 24.5 x 33 in&quot;I emailed the manufacturer for clarification, but received no answer.&nbsp; I called technical support asking for radiation pattern and gain variation vs frequency. After putting me on hold and checking with product management and engineering they came back saying that CM does not have such information (I suppose they did design and/or test it, didn't they ???).&nbsp; Someone in the CM sales team told me that the CM4221-HD is being sold for 5 or 6 years, so it seems unlikely that the inconsistencies and lack of data are a &quot;glitch&quot; like the ones that sometime appear while transitioning to a new model...Enough said.&nbsp; If someone has such documentation (or links to it) and can share, I would appreciate.&nbsp; Thank you.[/QUOTE]

[QUOTE="DW-77, post: 121996, member: 38055"]I have a particular combination of local and distant stations, that requires a certain antenna radiation pattern (gain variation over the frequency range wold be helpful, too). Based on reviews, the CM4221-HD looks like it might be a good candidate, but I cannot find any credible technical / performance data for it. The manufacturer web page managed to confuse me. [url=http://www.channelmasterstore.com/Digital_HDTV_Outdoor_TV_Antenna_p/cm-4221hd.htm]4-bay HDTV/UHF Digital Outdoor TV Antenna-Channel Master CM 4221HD (CM4221HD)[/url] states: "Designed for UHF/VHF reception from 470 to 700 MHz" and "Antenna Size: 4 x 20 x 36 in" [B][I]BUT[/I][/B] [URL="http://support.channelmaster.com/attachments/token/0l9p6mcidnys3eg/?name=CM4221HD+Data+Sheet.pdf"]http://support.channelmaster.com/attachments/token/0l9p6mcidnys3eg/?name=CM4221HD+Data+Sheet.pdf[/URL] states: "Reception Range Channels 14 thru 69" and "Antenna Size (L x W x H) 5.5 x 24.5 x 33 in" I emailed the manufacturer for clarification, but received no answer. I called technical support asking for radiation pattern and gain variation vs frequency. After putting me on hold and checking with product management and engineering they came back saying that CM does not have such information ([I]I suppose they did design and/or test it, didn't they ???[/I]). Someone in the CM sales team told me that the CM4221-HD is being sold for 5 or 6 years, so it seems unlikely that the inconsistencies and lack of data are a "glitch" like the ones that sometime appear while transitioning to a new model... Enough said. If someone has such documentation (or links to it) and can share, I would appreciate. Thank you.[/QUOTE]

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