Channel Master CM 4228 8-Bay Bowtie UHF Antenna (CM4228) - Page 4 - AVS Forum
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post #91 of 170 Old 08-27-2008, 12:33 PM
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Yep, Rabbit, you're who I was thinking of ...
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post #92 of 170 Old 08-28-2008, 06:28 AM
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Quote:


If I want to do some testing on my own for cable runs and locating my antenna, what kind of signal meter do I need?

Ther are plenty of older 'analog' SLM's (Signal Level Meters) on e-bay for well under $200. Some as low as $50. Actually, there are digital meters (not for digital channels though) for around $250.

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post #93 of 170 Old 09-12-2008, 07:19 AM
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I just noticed the new models are now up on Warren Electronics: 4221HD, 4228HD. Both are listed as "coming soon" with no price information. The old 4228 is still in stock but it looks the 4221 is gone.
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post #94 of 170 Old 09-12-2008, 09:20 AM
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People living closer to Frys B&M may still be able to pick up CM4228 from the B&M store. I visted Frys store in Vegas (labor day weekend) and was surprised to see CM4228 with a price tag of $59 (IIRC) instore. They were also selling antenna mounts, some channel master pre-amp (don't remember the model number). They also had a whole bunch of CECB (Airlink) in stock. I feel, RS, CC, BB should start selling these 2-bay/4-bay/8-bay bowtie design antennas more than those crappy overpriced antennas now that the switchover date is nearing.
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post #95 of 170 Old 10-19-2008, 03:49 PM
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Anyone know if the aluminum siding on my house will interfere with reception if its behind my CM4228? All the stations of interest near my house are in exactly the same direction and it would be very easy to point the CM4228 at them by mounting it below the eaves on the 2nd story of my house. This would put the aluminum soffits and siding out of the line of sight to the antenna but relatively close to the antenna ( < 1ft). It this going to be a problem such that I maybe need to put the antenna on a pole above the roof line ?
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post #96 of 170 Old 10-19-2008, 06:32 PM
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Quote:
Originally Posted by waterwingz View Post

Anyone know if the aluminum siding on my house will interfere with reception if its behind my CM4228? All the stations of interest near my house are in exactly the same direction and it would be very easy to point the CM4228 at them by mounting it below the eaves on the 2nd story of my house. This would put the aluminum soffits and siding out of the line of sight to the antenna but relatively close to the antenna ( < 1ft). It this going to be a problem such that I maybe need to put the antenna on a pole above the roof line ?

Yes, placing a second reflector behind the CM-4228 will affect the antenna.
On some freqs it may improve and on others may reduce gain. Hence YMMV.

Higher is better anyway....you'll just have to try it to see if you have enough signal.

I experienced a similar effect sniffing for signals 70+ miles (and a mountain pass)
away. When I mounted a 4-Bay against a brick wall the signal vanished and
returned only when I moved it a couple yards away. Did I say YMMV???


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post #97 of 170 Old 10-19-2008, 06:35 PM
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Here's an App. Note for Potomac Inst. FIM-71 and FIM-72 Signal Level Meters (NTSC)
discussing how to derive a correction for DTV measurement (12 dB):
http://www.pi-usa.com/pdf/dtva.pdf

Your meter may have a different correction, depending on measurement bandwidth, etc.


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post #98 of 170 Old 10-19-2008, 06:38 PM
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Due to their size, you may have to ASK Frys to retrieve a CM-4228 from their storage area.


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post #99 of 170 Old 10-20-2008, 08:50 PM
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Quote:
Originally Posted by waterwingz View Post

It this going to be a problem such that I maybe need to put the antenna on a pole above the roof line ?

I'd generally suggest going above the roof line. I recently was in a similar situation after a late fall move to a new house. I mounted my CM 4228 on the back porch roof, and the siding of the second floor was behind the antenna.

About a month and a half ago I mounted it against the side of the house and slightly above the roof line (rough 15' or so higher). Several channels improved in stability and a number of weaker signals that came in with tropo appeared much more often (from something to the order of once every two weeks to just about every night).

While not a radical improvement (I live in western PA, which means lots of hills) I felt the stability improvements alone were more than worth it.
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post #100 of 170 Old 11-08-2008, 07:36 PM
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I'm in central Kansas (flat lands) and with the 4228 an 7777 on 125' of cable I'm able to get all of the Wichita stations 90 miles to the south EXCEPT Fox is not reliable. There is a fox station only about 20 miles away but it is 135 degrees away from the Wichita stations. Currently the antenna gets the station with a LOT of ghosts.

I thought that I had read that the chicken wire mesh behind the 4228 was to keep signals from the back side from getting to the antenna. My thought is if that IS the case then I could cut off a couple rows of mesh and let the first row of bow ties pick up the signal from the back. There are no other stations to the north that would cause problems.

I'd appreciate any thoughts on this. Thanks
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post #101 of 170 Old 11-09-2008, 06:43 AM
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Quote:
Originally Posted by CJBaker View Post

I'm in central Kansas (flat lands) and with the 4228 an 7777 on 125' of cable I'm able to get all of the Wichita stations 90 miles to the south EXCEPT Fox is not reliable. There is a fox station only about 20 miles away but it is 135 degrees away from the Wichita stations.

I thought that I had read that the chicken wire mesh behind the 4228 was to keep signals from the back side from getting to the antenna. My thought is if that IS the case then I could cut off a couple rows of mesh and let the first row of bow ties pick up the signal from the back. There are no other stations to the north that would cause problems.

I'd appreciate any thoughts on this. Thanks

I have removed the 4228 screens to make mine bi-directional for VHF/UHF stations in two directions. See pic here. My stations are closer to 180° opposite directions and the farthest station I get is only ~70+ miles away. So it may or may not work in your situation. But it's simple to remove/replace the screens, and definitely worth a try. You may lose some gain when you do this.
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post #102 of 170 Old 11-09-2008, 06:46 AM
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I came across this link from a Canadian forum regarding the 'new' imported '4228HD';
http://www.digitek.tv/index.php?page...emart&Itemid=1

Though these are speced for Austraila, the reported gain is 13-15 db and F/B ratio is 24db.
Also notice the other models. Most are familar.

Abundant OTA television is what makes this country different from all others. Lets keep it this way.
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post #103 of 170 Old 11-10-2008, 04:03 PM
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Quote:
Originally Posted by mtnbike-dude View Post

That first link is of the new Channel Master line. So, they just are repackaging somebody elses antenna. Typical.

You guessed it - here's what I found regarding the CM4228HD and DigiTek's PA4 antenna sold from Australia:

http://www.digitalhome.ca/forum/showthread.php?t=95467
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post #104 of 170 Old 11-11-2008, 08:07 AM
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Someone is following me around..........

Abundant OTA television is what makes this country different from all others. Lets keep it this way.
The Internet is no place for streaming video.
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post #105 of 170 Old 11-11-2008, 11:27 AM
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Naw, I've just been north of the border most of the time so I thought I'd drop in again.
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post #106 of 170 Old 12-03-2008, 05:09 AM
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The 4228HD is now available here, and at other online sites.
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post #107 of 170 Old 12-03-2008, 07:55 PM
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I paid $50 for my orginal US made 4228 3 years ago. Now for a cheap Chineese import, it's $65.

Abundant OTA television is what makes this country different from all others. Lets keep it this way.
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post #108 of 170 Old 12-09-2008, 09:42 AM
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Does anyone have the datasheet for the CM 4228 - the one that shows the gain at different frequency bands? I would like to compare the specs vs. the "new and improved" versions.
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post #109 of 170 Old 12-09-2008, 10:22 AM
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Quote:
Originally Posted by antennaguyga View Post

Does anyone have the datasheet for the CM 4228 - the one that shows the gain at different frequency bands? I would like to compare the specs vs. the "new and improved" versions.

Only info I have is:

http://www.hdtvprimer.com/ANTENNAS/cm4228.html
http://www.hdtvprimer.com/ANTENNAS/comparing.html
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post #110 of 170 Old 12-09-2008, 11:02 AM
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C-M antenna specs are still on the StarkElectronic website:
http://www.starkelectronic.com/cmg2.htm
http://www.starkelectronic.com/cmg4.htm
http://www.starkelectronic.com/cmg5.htm


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post #111 of 170 Old 12-12-2008, 09:25 AM
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Thanks.

I did several searches and even checked stark but missed that.

BTW, I was also looking to possibly buy one but there seem to be none to be had, including eBay.
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post #112 of 170 Old 12-27-2008, 12:28 PM
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Anyone tested the new model yet?
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post #113 of 170 Old 12-27-2008, 11:56 PM
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Quote:
Originally Posted by arxaw View Post

Anyone tested the new model yet?

Nope ... but it looks like a case of "let's use cheaper parts and charge 1.5 times as much as the original." .... meh, Pass. I'm glad I got the real deal a few years ago.
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post #114 of 170 Old 12-28-2008, 05:35 AM
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Originally Posted by HDTVChallenged View Post

Nope ... but it looks like a case of "let's use cheaper parts and charge 1.5 times as much as the original." .... meh, Pass. I'm glad I got the real deal a few years ago.

Agreed. Still, I'd like to see someone test/compare this thing and post results like this.
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post #115 of 170 Old 12-28-2008, 08:11 AM
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FIRST, someone has to post some ACCURATE measurements and hi-rez PHOTOS.


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post #116 of 170 Old 12-28-2008, 07:28 PM
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Well, I was just going to ask about these redesigns. I was looking to upgrade to the 4228 over the 4221 to fix a particularly pesky local station. But I guess I'll wait until some feedback comes in on the new design.
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post #117 of 170 Old 12-29-2008, 04:02 AM
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I have a ClearStream 4 (C4) from Antennas Direct which performs very well considering its size but I was looking for something more and bought the new CM4228-HD from Channel Master after reading reviews of the CM4228. Very disappointing. Despite being a much larger 8 bowtie design it got about 10 to 15 % less signal strength across the board and 7 less channels picked up. No improvement over the ClearStream 4 on VHF-HI either. I played around with it for about a week and that was the best I could get from it. It's also poorly constructed compared to the ClearStream 4. The only good thing about it was that is ships pretty much fully assembled.

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post #118 of 170 Old 12-29-2008, 05:43 AM
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I'm sorry to hear about your disappointing results with the "new" 4228.
It appears that Channel Master took a good thing. And ruined it.
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post #119 of 170 Old 12-31-2008, 06:19 AM
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Quote:
after reading reviews of the CM4228

These were reviews of the orginal 4228, not the 4228HD import, correct?

That "Clear Stream" is that new odd looking antenna with those discs?

Abundant OTA television is what makes this country different from all others. Lets keep it this way.
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post #120 of 170 Old 12-31-2008, 06:24 AM
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Quote:
Originally Posted by videobruce View Post

These were reviews of the orginal 4228, not the 4228HD import, correct?

That "Clear Stream" is that new odd looking antenna with those discs?

What's the purpose of those discs, anyway (other than to look unconventional)? Are they metal or pieces of plastic?
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