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Winegard AP 8275 in place of CM 7777?

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Old 05-26-2006, 02:20 PM   #1
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Default Winegard AP 8275 in place of CM 7777?

Ordered the Channel Master CM 7777, and the supplier was out, and recommended the Winegard AP 8275 instead.

How do these compare? Is the Winegard considered as good as the Channel Master? Or should I order the Channel Master somewhere else. I did notice the Winegard had 29 db gain as compared to the Channel Master's 23 db.
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Old 05-26-2006, 03:35 PM   #2
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The only real functional difference between the two peamps is that the Channel Master has separate inputs for UHF and VHF, oryhey can be combined internally by using a switch. The AP 8275 has a single combined input for both UHF and VHF. The only real advantage to the Channel Master arrangement is that it facilitates using separate UHF and VHF antennas by allowing tow antenna inputs and combining them into a single coax output. If you are using an all-channel antenna, there is no real practical diffrence, but the Channel Master is easier to use when installing separate UHF and VHF antennas. There is really no functional difference between the two preamps in terms of performance. I usually see higher prices for the Winegard preamp, so see if you can bargain them down if they are out of stock on the Channel Master, or look for another supplier.
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Old 05-26-2006, 04:42 PM   #3
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Ok, thanks Tigerbangs. Yeah, the Winegard was more expensive. I will see what I can do.
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Old 05-26-2006, 05:37 PM   #4
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Quote:
My Antenna(Channel Master 4228).

I am receiving Two local high def. channels that are about 18 miles away with no problem. However, two channels that are located about 37 miles away, come in and out. Maybe, on somedays, I may receive them with relatively little problem, and on others, I can hardly get them at all.


I have the antenna feeding two tv's, through a splitter that is located just below the Antenna, and underneath the eaves of the roof. From this splitter, I have the two feeds both going into indoor preamps(Channel Master 3042's) located near each of the two tv's.

I wasn't sure how to hook up both sets with a mast mounted preamp. It seemed to me that the outdoor amp could only feed one tv since the other box would have to sit indoors next to a/the TV........??? Am I wrong? How about the hook up for an outdoor mast mounted amplifier to feed two tv's?
The AP8285 has quite alot of gain (29db). May consider an AP 8700 (19).

Plus you have 1 distibution amp at each set??? which will not be necessary

Do you need help installing?

Last edited by Rick0725; 05-26-2006 at 05:46 PM.
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Old 05-26-2006, 05:54 PM   #5
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Quote:
Originally Posted by Rick0725
The AP8285 has quite alot of gain (29db). May consider an AP 8700 (19).

Plus you have 1 distibution amp at each set??? which will not be necessary

Do you need help installing?
Well, I may have to do away with the two current preamps, and see how it does. I have already ordered the Winegard 8275 this evening from Summit Source for $ 56.62( which I thought seemed to be pretty good price). Not sure what else I will need, I will get back when I see how this is going to do. Must have those locals in HD.......

I am not sure how to hook up both TV's with the Winegard 8275. I believe someone in the forums(Maybe Tigerbangs) suggested a DC isolation splitter.
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Old 05-27-2006, 02:27 PM   #6
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Quote:
Originally Posted by Rick0725
The AP8285 has quite alot of gain (29db). May consider an AP 8700 (19).

Plus you have 1 distibution amp at each set??? which will not be necessary

Do you need help installing?
So you think that the AP8275 will be too much gain? I am planning on splitting the signal if possible with two tv's. Not sure how to do that with only one power supply with the kit. How would too much gain show itself/symptoms? I could always send the 8275 back and get the 8700 model........
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Old 05-27-2006, 02:38 PM   #7
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Quote:
Originally Posted by Amerikes
Ordered the Channel Master CM 7777, and the supplier was out, and recommended the Winegard AP 8275 instead.
How do these compare? Is the Winegard considered as good as the Channel Master? Or should I order the Channel Master somewhere else. I did notice the Winegard had 29 db gain as compared to the Channel Master's 23 db.
here's one with a noise figure 5x better than those - don't know where to buy it or how much it costs - Anybody know of a good/cheap online source -I just get ATI 9250 hits from froogle -sent them an email -
I might be able to get those DX digitals with this and my 4228
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http://www.researchcomms.com/hdtv.html
FREQUENCY 470-862 MHz. (USA 470-800 MHz.)
NOISE FIGURE 0.4 dB.
GAIN 20 dB.
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Last edited by maicaw; 05-27-2006 at 02:53 PM.
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Old 05-27-2006, 02:52 PM   #8
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you would order it direct from the supplier overseas ... email them and they will give you a quote for delivered pricing for lna and protective enclosure.
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Old 05-27-2006, 03:15 PM   #9
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Here's a great thread ??? Forum > HDTV > HDTV Reception Hardware Antennas, rotators, boosters/preamps... for wide-band VHF/UHF
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Old 05-27-2006, 06:02 PM   #10
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Quote:
Originally Posted by Amerikes
So you think that the AP8275 will be too much gain? I am planning on splitting the signal if possible with two tv's. Not sure how to do that with only one power supply with the kit. How would too much gain show itself/symptoms? I could always send the 8275 back and get the 8700 model........
I was reading your past posts and came across this information that affected my concerns..

WVAH 11.1............. 279 degree's at 18.6 miles.
WCHS 8.1............. 279 degree's at 18.6 miles.

WSAZ 3.1............ 289 degree's at 35.9 miles.
WOWK 13.1............ 289 degree's at 35.9 miles.

There is the chance that the ap8275 may overload your system because the stations at 18.6 miles are close in direction to the stations at 35.9 miles. the ap8700 may be too much also. There are variables that come into play and it is difficult to determine them ahead of time. We will wait and see tiil you try the ap8275.

signs of overload on analog
-co channel interference of one channel over another.
-herringbone interference on some of the channels close by.

sign of overload on digital.
-as you point to the towers, signal level tends to go down
-as you point away from the towers, signal level may go up.

Describe your set up and we will help you install your amp into your system.
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Old 05-27-2006, 06:40 PM   #11
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Forgot to mention...you are not using a rotor.
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Old 05-27-2006, 06:46 PM   #12
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Thanks Rick0725, Well here goes........

I have two plama TV's one a Panasonic 50" and the other a Panasonic 37". I currently have both of them hooked to a CM 4228 UHF Antenna that goes through a two output splitter on the outside of my home, using RG6 cable. They are both being fed into two CM 3042(13 db) indoor preamps that are now going into DirectTV LG-600 HD receivers. From there, I am using the Component Video output into the TV's. Also, I am going from the two receivers optical output into a Pioneer 1015 TX audio receiver.

After some of the trees came out with leaves in the direction of the broadcast towers, I lost Channel 3 completely, I would estimate Channel 3 at or below 50% now. Channel 13 comes in just over 66% possibly 70 %. Both of the other channels 8 and 11 are around 90% or so.

I plan on putting up another mast for the antenna, but it will only add about 2 or 3 feet to the height. Although several months ago I raised the mast an additional 5 feet and that took it just above my roof line, and it made a significant improvement at that time, in receiving channels 3 and 13 without dropouts.

What would you recommend? No Rotor, due to the close proximity to the towers.
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Old 05-27-2006, 06:53 PM   #13
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Also, I had thought that the CM 3042 would be removed, when I installed the new Winegard mast amp.
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Old 05-28-2006, 05:49 AM   #14
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Granted your stations are about 10 degrees apart but:

-a rotor will assist in improving the reception of the stations 36 miles away

-will allow you to point the antenna away from the closer towers if you are experiencing overload

-offer the flexibilty to move the antenna even just a tadd to improve signal even on a bad reception day or if you are experiencing multipath.

-allows you the opportunity to peak the antenna from inside while looking at a picture and signal meter instead of the "how does it look method" and being able to see the progress yourself.

while you are waiting for your preamp, it might be a good idea trying to locate a rotor... maybe at a lowes near by...and and not just think about... but actually installing one at your place. I know you were not thinking about the expense of a rotor, but it will be worth it.

otherwise its trip ...after trip...after trip... up the ladder.

In my thousand years doing antenna work, I only installed preamps the standard way...I never power injected with a splitter set up like yours. So I guess we are both going to learn something today.
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Old 05-28-2006, 07:24 AM   #15
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Rick, I will try the splitter both ways to see what it does. I really only need the locals on one TV, but of course it would be better to have it on both. I guess I will experiment......but that can become expensive....... . I normally do not send the less expensive things back, mostly I just eat them. After getting DirectTV recently, with their two LG 600 HD receivers, I can input my OTA through them. So that means, that I now have two HD receivers that will be available, unless I ditch DirectTV in the next 30 days. My contract will be for two years, and in that time they should have the locals in HD in my area. So as you can see, and probably have experienced also, things can start piling up around here while trying to get the best setup..... .

And as for the rotor, I have the mast pole mounted to the side of my deck, and I plan on putting a 30' mast that I obtained from Lowe's(you may know the one that I am talking about). However, I will help to stabilize it by putting it on a concrete pad, that will have a pipe rising out of the pad, that the mast will sit on. I have been just walking out on my deck and turning it. Of course, I have considered the rotor before, and may end up using it.

Could a peson install two preamps on the pole, with separate inputs to each TV? Oh well, this is getting crazy. What a person will do to get local channels......hehe! But, it is kinda fun messing with this stuff, albeit expensive.
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