I read this on http://www.hdtvprimer.com/ANTENNAS/cm4228.html that if you were to Replace the feed lines with two baluns and a splitter would probably yield a higher net gain.

Has anybody tried this ?

Is the Baluns just a 300 to 75 ohm impeadance adaptor if so I might try this and see if I get better results ?

As the 4221 4 bay gives better gain than the 4228 over channel 60.

Scroll down to net gain and you can see by chan 70 its a 3 db gain for a smaller antenna ? http://www.hdtvprimer.com/ANTENNAS/comparing.html

Give it a try and see… but I doubt it. A splitter had a 3dB insertion loss. The way the antenna is made with the two arrays ganged up is the right way… but give it a test and see… let us know!

Although it isn't documented in the literature any longer, you can extend the high-frequency response of the 4228 by as much as 6 db at channel 69 if you modify the antenna as follows:

locate the score marks on each tine of each bowtie
cut them at the score marks using a pair of wire dikes.
this is going to to involve a total of 32 cuts: 4 on each bowtie.

The result is a BIG improvement on UHF channels above 60 while giving up some gain at lower frequencies. This proceedure was documented in the product literature years ago, but after the USA phased out broadcasting above channel 69, I guess that Channel Master figured it was unnecessary. Since a number of Canadian cities plan DTV broadcasting above channel 60, and some US cities have DTV channels up that high (Philadelphia, for one), knowing about this modification can definitely help!

Since a number of Canadian cities plan DTV broadcasting above channel 60, and some US cities have DTV channels up that high (Philadelphia, for one), knowing about this modification can definitely help!Do you remember if the article discussed what happened to the low end roll off after the modifing "cut's" were applied? Particularly where it occurrs? Right now the 4228 is also a good VHF-High antenna which I shouldn't need in Southern Ontario since as far as I know there will be no digital transmitters in range in that band after the transition is complete. Also Fox Buffalo on 14 will revert to 29 at high power in a few years. That means CBC HD on 20 will be my low marker. I could use the extra high end gain right now to get Toronto 1 on 66 and by next summer OMNI and Global should be on 64 & 65 also at very low power. I've been thinking about getting a 4221 just for that reason. If I knew that clipping the bow ties a little would turn my 4228 into a great UHF only antenna I would go that route.

Even without the modification I mentioned earlier, the 4228 is STILL the best all-around UHF antenna in the business: I think that you can be pretty sure that you won't have much of a problem getting what you are looking for with or without the modification.

Just one note of caution, if it hasn't occurred to you yet:

Please be aware that the first option that Yaamon presented is reversible, meaning that you can put things back the way they were whenever you like (did you write down how things are before you made the changes?).

The second option about trimming the bowties is NOT reversible. Got that? OK. ;)

The second option about trimming the bowties is NOT reversible. Got that? OK. ;)
What? No spot welder?? ;)

What? No spot welder?? ;)Are you volunteering to test that out on one of yours? :D

Although it isn't documented in the literature any longer, you can extend the high-frequency response of the 4228 by as much as 6 db at channel 69 if you modify the antenna as follows:I went ahead and made the cuts! all 32 of them. As you said each of the elements had a score mark a little over an inch in from the outside so now they are all a little shorter.

I now get 4 bars on channel 66 (Toronto 1) on the samsung 351 where before I got none. My off axis reception of FOX Buffalo on 14 is not as good as before, but fine when I aim the antenna at grand island. I only watch OTA DTV so I have not checked the impact on VHF high.

Now my problem is multipath on 66 making it hard to get a lock on the 351. I'm fairly sure that 66 is not using the CN tower rather a lower height from the top of first canadian place. Is this location permanent?

I get MUCH better results with CITY at lower power from higher up on the CN Tower.

Also does any one have experence with the difference in multipath rejection capabilities between the sammy 351 vs the LG 4200 at the top of the DTS band (60's)? Anyone here in Burlington got a 4200 to trade with a 351 for a few minutes of testing?

What is the hook up on the 4228? 300 ohm twin connector or 75 ohm coaxial (f connector)?

I was under the impression that the CM 0264DSB with its 300 ohm twin input and 75 ohm output is matched to the 4228 while output is on coaxial F connector cable. This as opposed to the 7775 which is f connector input and output (ie, an adaptor is needed)

thx

kw.............

The 4228 comes with a 75 ohm F connector. So I used a short 6" RG6 cable in from the CM4228 connector.

The 4228 comes with a 75 ohm F connector. So I used a short 6" RG6 cable in from the CM4228 connector.Channel Master 4228s now come equipped with a matched balun to output 75ohm signal, but I recommend that you mark one of the 300ohm leads so that you don't accidentally get them mixed up in the future if you decide to gang two 4228s for some reason. Ya never know...

I just bought a semi-detached house in Mississauga and I'd like to buy a 4228, but I'm not sure I want to piss off the neighbour just yet. I'm debating going with an attic install (I assume the antenna can be taken apart to fit in the attic) or mounting it in a spare bedroom that will be facing south.

If the neighbour ends up being a jerk, I'm slapping that sucker on the roof. If I do mount it on the roof, should I be concerned with wind loading? The 4228 is steel and it weighs 15 pounds by itself.

Any advice appreciated.

If I do mount it on the roof, should I be concerned with wind loading? The 4228 is steel and it weighs 15 pounds by itself.Hi, the weight you've mentioned is not correct at all, so you don't need to worry about it or any wind load problems if your house is not in a tornado alley. ;) I don't know why that false weight number seems to be around, but my 4228 weighed nowhere near that. See this post as well:

http://www.digitalhomecanada.com/forum/showpost.php?p=89360&postcount=3

also there's an excellent analysis of attic mount signal penalty in one of the threads here from an engineer. Keep it out of the attic, and if your neighbour has anything to say about your antenna just show him your results.

I've decided to get a Channel Master 4228 with the hopes of improving my reception over the terk 55 i'm using now . I've had a hard time finding a supplier in the buffalo area or anyone on line that will ship to Canada can anyone help

I've had a hard time finding a supplier in the buffalo area or anyone on line that will ship to Canada can anyone helpCheck out the OTA Equipment thread and you'll find a Canadian dealer:

http://www.digitalhomecanada.com/forum/showthread.php?t=23984 (http://www.digitalhomecanada.com/forum/showthread.php?t=23984)

I specifically asked about american suppliers because i do not want to spend $120.00 for a antenna that's for sale in the U.S for $39.00us

And next time you'll specifically say "no Canadian dealer info wanted", right? :) Thankfully you're close to the border.

I specifically asked about american suppliers because i do not want to spend $120.00 for a antenna that's for sale in the U.S for $39.00us

$120....try $148 thats how much I paid for it....sure is a rip off...we are definitely in need of some competition. Of course thats including tax. and I had to go pick it up too :)

The place in US that I saw it for $39 doesnt ship to Canada but if your going for a trip.

S***! My CM4228 just fell down. :mad: It looks ok though.

Note to self: three pieces of tape won't hold a CM4228 for more than a week in hot weather.