OTA Clone, Coat Hanger, and Junk Antennas - Page 5 - Canadian TV, Computing and Home Theatre Forums

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post #61 of 248 (permalink) Old 2009-05-04, 01:16 PM
 
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The difference in price between a clone and CM4221 is small, may be less $15-20...However, the performance difference is day and night. For example, my CM4221 (<$55.00) is rated 45 miles but able to pull in WGRZ (solid) from 86 miles away, try that with a clone.
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post #62 of 248 (permalink) Old 2009-05-04, 01:54 PM
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Mileage ratings given by manufacturers should always be ignored. See the Antenna Chart for "real world" expectations.
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post #63 of 248 (permalink) Old 2009-05-04, 07:36 PM
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I think you should drop the word "clone" from your usage here.. after all, the CM4221HD is a "clone" of the chinese models available before it. The ones you are referring to as clones of the 4221HD.
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post #64 of 248 (permalink) Old 2009-05-04, 10:59 PM
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The bowtie antenna was invented in 1898 so they're all clones if you take it literally.

In this environment of OTA in Canada I'm sure we all know what is meant by "clones" in this context.

In the clothing industry they use the term "knockoff" for cheap Chinese imitation goods. Maybe that would be a better term for these antennas...
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post #65 of 248 (permalink) Old 2009-05-07, 12:00 PM
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Homemade DB8 Antenna - Garbage?

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Originally Posted by stampeder View Post
Our experts have tested them thoroughly and have found that they are garbage compared to what we've created in the Gray Hoverman and mclapp Do-It-Yourself antenna models found in the link given by recneps77.
Well I did build one of those coat hanger DB8 antennas, and in Toronto, ON, I can pull in 12 HD channels, 10 local, 2 US (flaky reception). This was before I found out about the GH antenna designs.

If this is garbage compared with a GH antenna, then a GH antenna is definitely the next model I will try to build as my reception right now is quite good with the homemade DB8 (aka bowtie style antenna).
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post #66 of 248 (permalink) Old 2009-05-07, 10:38 PM
 
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Can you build a GrayHoverman out of coathangers? I don't have much tech & tools to work with better stuff, and I'm sure that if it could be done then a lot of people would love to learn how... I am one of those who built the 4 bay bowties out of coathangers from youtube - built two of them and am relatively happy. Like the other guy said, if the GH is way better then I'd definitely make one too... out of coathanger if possible, or maybe copper wire.
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post #67 of 248 (permalink) Old 2009-05-08, 09:21 AM
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You likely can, by building a bungh of the outside angle pieces and jouning them on the inside where they are fixed tot he structure.
It is better to use one piece though.

I might build a copper GH, since I have a bit of #8 solid copper available to me.
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post #68 of 248 (permalink) Old 2009-05-08, 11:55 AM
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I would definitely not build a GH out of coat hangers. If you have to drive a nail you don't want a sponge rubber hammer!

The beauty of the GH is that by following the plans and using the recommended materials you get the very best antenna you could need.
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post #69 of 248 (permalink) Old 2009-05-08, 11:13 PM
 
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But if you want to try out a GH at virtually no cost, a bit of 2x4, 4 coat hangers, some screws and a few inches of cat5 cable will do it. That was my first attempt and it worked amazingly well - a fact I attribute to the forgiving nature of the GH.

For mine, I bent four identical half-elements (purely by hand) with a little bit of overlap at the feed point, where I wire-tied them together with some cat5 wire.

Yes, it's a hack, but it can give you some idea if a GH is for you. That reflectorless non-amplified coat-hanger GH was able to pick up 4 (of 9) distant stations (35 miles, 1 edge) that didn't even show a blip when I tried a simple UHF loop.
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post #70 of 248 (permalink) Old 2009-05-23, 09:14 AM
 
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Wink 30% improvement original CM4221HD over clone

Personally, I would recommend getting an authentic Channel Master 4221HD. I bought a clone 4221HD first because it was all I could get around here in London. Don't get me wrong the clone worked really well but I have noticed an improvement of 30% on signal strength from the original vs the clone.

roof mounted 35ft UHF Antennas Direct XG91, VHF Delhi VIP 302SR, RC 6292, Tii Coaxial Lightning Surge Protection

Last edited by stampeder; 2009-05-23 at 12:16 PM.
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post #71 of 248 (permalink) Old 2009-05-23, 12:15 PM
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PanaMark, that was with the CM4221HD hardware hack too? That's a substantial difference in performance!
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post #72 of 248 (permalink) Old 2009-05-23, 05:52 PM
 
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The only thing I did was take off the plastic caps.
I was to darn excited to see what the difference was between the clone and the Channel Master without introducing the hack.
I am glad enough with my results, and i'm sticking to it.

roof mounted 35ft UHF Antennas Direct XG91, VHF Delhi VIP 302SR, RC 6292, Tii Coaxial Lightning Surge Protection
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post #73 of 248 (permalink) Old 2009-06-15, 04:10 PM
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Digiwav Ant-20XX Series

I noticed a local supplier selling Digiwav Ant-2084, Ant-2085 and Ant-2086 bow tie antennas. Does anyone have any experience with these Digiwav Antennas? They look like they are in the same class as the CM 4221HD.
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post #74 of 248 (permalink) Old 2009-06-15, 04:40 PM
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post #75 of 248 (permalink) Old 2009-06-15, 04:44 PM
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Thanks for the info. I did a search for ********, not Digi Wave, with a nil return. This is good info to know.
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