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want to replace existing uhf vhf antennas on chimney

post #1 of 15
Thread Starter 
i have two huge antennas on my chimney- they look similiar but im sure one is uhf and its probably the one thats lowest and not on a rotor and then the vhf thats on top with the rotor - well i want to replace the rotor as it doesnt work - but i think i will keep both antennas if its necessary ?? -- i have purchased a new cm rotor and wire - new clamps and two new mast - i am going to replace the ends that go from antennas to coax - i purchased one of the uhf vhf combiners so i can run one coax down the pipe inside of the bricks that make up the chimney - in the basement is where the two existing coax come out and then they go to a box that plugs into a electrical socket for power - this box has 1 in and 4 or maybe 5 outs - i assume this is some type of booster and splitter for more than one tv - let me say this - i have changed nothing and i get tv pretty good - oh there is also a small box with a red light on it for fm and uhf coax too but it doesnt go to the big splitter box i dont think - can i use the combiner for uhf and vhf and run one coax to the big box that goes out to the tv's - my questions are would you keep both antennas and how can i still use the small uhf box or would you just take both down and go with one antenna that picks up both uhf and vhf - it does work pretty good now but i need to replace rotor and poles/hardware and cables because they are old --- i appreciate all suggestions and comments here
post #2 of 15
Thread Starter 
i wanted to add this info - i get several channels and they are great hd - the zip is 27006 in NC -- the main channels are 2 and 8 and 12 and those have sub channels as well - and several higher than these like 36 48 45 26 so keep that in mind if you suggest an antenna for me or the uhf thing that is currently hooked up - i am not sure how its connected to the big box that goes out to the tvs- thanks
post #3 of 15
Topic moved.
post #4 of 15
Thread Starter 
sorry for sticking post in wrong place - i will look around a little more before i post again
post #5 of 15
Thread Starter 
ok let me start again on these questions - if this was your house and you wanted to watch 3 tvs and could mount anything up on the chimney - then what would your setup consist of - and i have a new rotor !!
post #6 of 15
Quote:
Originally Posted by smgchandler View Post

ok let me start again on these questions - if this was your house and you wanted to watch 3 tvs and could mount anything up on the chimney - then what would your setup consist of - and i have a new rotor !!

If multiple TV's will be on at the same time, a rotor can cause the reception to go out on one TV if another is watching TV on a channel that's in a similar direction, and you have the antenna rotated.

How are the conditions of your current antennas? If they're still good, I would continue to use them, as one thing you don't have to buy. If the cables are still good, you can keep them too. Otherwise, get RG6 coax. I also looked at what's available based on your zipcode, and unless you also get lots of out of market stations, you won't need the VHF antenna anymore, as your market is now an all UHF market. So if you're only relying on local stations, I'd get rid of the VHF antenna, and just use the UHF antenna on the rotor. Most of the VHF stations that are available are in areas around Advance, North Carolina. This is the
TV Fool chart, based on your zipcode. I also looked at antennaweb.org, and that's where it listed all stations for your immediate area being all UHF. I don't know if you receive VHF stations at all in your area or not. If you do, then keep the VHF antenna. Otherwise, get rid of it. I personally prefer separate VHF & UHF antennas myself, as they're not as bulky as a VHF/UHF combo antenna can be. It usually costs more, but they usually take up less space on your pole, and don't always weigh it down as much.

Now if I lived in your location, and only relied on the local stations, I'd just get 3 UHF antennas, and mount them directly to the pole, based on the direction of each channel in the 3 directions they transmit from.
post #7 of 15
Thread Starter 
thanks a lot for the info and suggestions - how can i tell which antenna is uhf and which one is vhf - they look similiar but one is stationary and the other is on the rotor - i assume the fixed one on the bottom is uhf ??
post #8 of 15
The larger antenna with the widest elements is usually the VHF. Can you take a pic of them?

In the picture below the bottom antenna is VHF & the top is UHF.
LL
post #9 of 15
In general, longer elements (crosspieces) are for VHF. I agree with dave73 that you don't need VHF unless you want to try for WTVI (the Charlotte PBS station that isn't part of the UNC-TV system).
post #10 of 15
Make sure you know what actual RF channel numbers your channnels 2-13 are tranmitting on using TVfool.com. They may all be on UHF or if none are using real VHF channels 1-6 then you can bet a combined VHF 7 and higher + UHF antenna "HDTV" directional antenna which will eliminate multpath interfeence which can easily occure with digital TV signals.
post #11 of 15
Thread Starter 
i think i might have 2 vhf antennas but my tv does ok with them now- the look the same except one has an extra set of loops toward the middle - i will take a couple of pics and post -
post #12 of 15
Sounds like an FM radio antenna and a VHF TV antenna.
post #13 of 15
With a good UHF antenna, you should easily be able to receive all major Greensboro/Winston-Salem channels as well as the Charlotte channels. I would try a Channel Master 4221 bow-tie antenna with a Winegard 269 preamp or CM 7777 amp if more power is needed. You could probably find a sweet spot for both markets without need for a rotor. If a little more gain were needed to receive both markets, you could step up to a CM 4228 8-bay antenna. Would probably even work fine in attic. Another choice could be Clearstream 2 antenna sold at BBY or cheaper at Costco. And of course a UHF yagi style antenna would work as well but might require a rotor to receive both Charlotte and Greensboro as they are more directional. An Antennas Direct 43XG or Antennacraft MXU47 should both be sufficient with a WG 269 or CM 7777 preamp.
post #14 of 15
Thread Starter 
ok im all for a smaller antenna but will this 4221 pick up as well as the two that are up there or better ? - i did some looking too - the two boxes downstairs that one of the two coax goes to are a cm 0062- im not sure where the number 2 coax goes but i dont think it goes the the 0062 - the cm0062 has 4 outs to the tv's and one in and a switch that has 2 settings - fm trap/out (what is the fmtrap or out settings for and a smaller box also 110ac powered thats before the 0062 that has a switch that says in/out and on this box it says uhf vhf fm trap 24db amp- whats the switch for on it AND on both where should the switches be set ??? and now for the last question -------if i put one of these 4221 up there and use this amp as close to the antenna as possible and run that one coax through the amp and then to the 0062 box then will that work great ?? and if not what would you do different - thanks fellas for all the good info
post #15 of 15
Thread Starter 
what do you think about an Antennacraft U8000 and the reason i ask is i have a almost new one on a rent house that is not being used - i know its only a few months old and needs to be taken down anyhow - just trying to save a few here but i dont want to go back on roof a 2nd time unless i have to so if it has a bad review so be it - i will order a cm
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