Two aerials
- Thread starter swa110w
- Start date
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If they are both pointing at the same transmitter, there's no technical reason why a single aerial can't be used with a passive- or amplified-splitter to provide as many outputs as required.
http://www.satcure.co.uk/tech/amps.htm
http://www.satcure.co.uk/tech/amps.htm
And where I live, they used to have 2 pointing in different directions because of regional differences, In this case, Anglia and Central..
C
ChrisFrost
Most often it's the cheapest way to get a TV signal in to another room. A proper distribution amp would be a better long term purchase, but chucking up a cheap contract aerial on to an existing mast and tacking a bit if cable round to the bedroom/kitchen/conservatory is what so many people go for.
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On one estate I saw a house with a dish, and FIVE aerials all pointing the same way. One of them was on a wall pointing THROUGH the roof!
All totally illegal, of course, since you are permitted to have no more than TWO receiving antennas of any description.
All totally illegal, of course, since you are permitted to have no more than TWO receiving antennas of any description.
So, Freeview, FM, and DAB would not be allowed, before you even start on the minidish. Or would they be counted as one on a single mounting pole?
The thing about "illegal" is it's purely academic unless:
1. you live in a "conservation area" where the council has spies or
2. a neighbour knows the law and "grasses you up".
I doubt that anyone would object to radio and TV aerials combined.
1. you live in a "conservation area" where the council has spies or
2. a neighbour knows the law and "grasses you up".
I doubt that anyone would object to radio and TV aerials combined.
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In days before freeview many where I live had two aerials one for Welsh and one for English TV. I did have two aerials on my rotator one for TV and other for 2 meter and below rotator a sky dish never had a complaint. I could with TV receive Moel-y-parc, Winter Hill and Central horizontally polarised.
For kitchen I had a third aerial on extension and for living room yet another aerial as I found using boosters to split the signal also seemed to boost the local 2 meter transmission causing break through but with no pre-amps all worked A1.
Today no longer transmit from the house and use dish for satellite only with loop aerial on windowsill for Yesterday on freeview. I did not apply for permission for aerials however the HB9CV is rather small and now since been there over 10 years would not need to.
Should I stick a mast in garden then that's clearly different but small TV aerials no one worries about unless some special area.
For kitchen I had a third aerial on extension and for living room yet another aerial as I found using boosters to split the signal also seemed to boost the local 2 meter transmission causing break through but with no pre-amps all worked A1.
Today no longer transmit from the house and use dish for satellite only with loop aerial on windowsill for Yesterday on freeview. I did not apply for permission for aerials however the HB9CV is rather small and now since been there over 10 years would not need to.
Should I stick a mast in garden then that's clearly different but small TV aerials no one worries about unless some special area.
Thanks for the replies.
I can't see why there would any special circumstances dictating the need for my two aerials. I live in Yorkshire, and both aerials appear to be pointing at Emley Moor. Also, the only aerial socket we have is downstairs (the previous owners had Sky, in every room). Strange. Perhaps they used to have signal trouble round these parts?
So I'm guessing, other than for aesthetics, there is no advantage in taking down one of the aerials?
I can't see why there would any special circumstances dictating the need for my two aerials. I live in Yorkshire, and both aerials appear to be pointing at Emley Moor. Also, the only aerial socket we have is downstairs (the previous owners had Sky, in every room). Strange. Perhaps they used to have signal trouble round these parts?
So I'm guessing, other than for aesthetics, there is no advantage in taking down one of the aerials?
If the aerials are close together, they could be interfering with the "beam" pattern, so reception might be improved by removing one. In addition, you would halve the risk of an aerial falling on someone's head!
There may be other advantages, dependent on where/how they are attached and where/how the cables are run.
There may be other advantages, dependent on where/how they are attached and where/how the cables are run.
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I would assume the frequency range of a TV is too large to stack aerials with amateur radio putting up 9 aerials is not unknown with earth moon earth 2 meter band coms across the pond clearly all with very carefully cut lead lengths so all in sink together and since the whole band is not used the frequency range is quite tight. Using three aerials stacked is also used.
I think one could stack TV aerials but the reason with 2 meter is stacking reduces the up and down receive and in the main not looking for satellites but it does not reduce to side to side receive so means the rotator can travel faster. However with TV the broadcast station does not move so most of the advantages are lost.
With TV the only real reason to stack would be signal rejection where something is causing interference but I don't know of any cases of that.
I remember suppressing a smile when a TV aerial guy said he got some unusual requests like using two aerials to get better signals and had explained it would not work. Well it could work for a single frequency I would be interested to hear if it is ever done with broadcast TV? I suspect not.
however moving into a new house one can find all sorts I wonder what people would think with this house when they find home made band pass filters built in to the outlet points specially as now all shorted out to allow the digi eye to work with sky. Would be a real head scratcher. Today easy to buy the filters but not at the time they were made.
I think one could stack TV aerials but the reason with 2 meter is stacking reduces the up and down receive and in the main not looking for satellites but it does not reduce to side to side receive so means the rotator can travel faster. However with TV the broadcast station does not move so most of the advantages are lost.
With TV the only real reason to stack would be signal rejection where something is causing interference but I don't know of any cases of that.
I remember suppressing a smile when a TV aerial guy said he got some unusual requests like using two aerials to get better signals and had explained it would not work. Well it could work for a single frequency I would be interested to hear if it is ever done with broadcast TV? I suspect not.
however moving into a new house one can find all sorts I wonder what people would think with this house when they find home made band pass filters built in to the outlet points specially as now all shorted out to allow the digi eye to work with sky. Would be a real head scratcher. Today easy to buy the filters but not at the time they were made.
I have seen 2 of the same installed at 90 degrees. His argument was for polarisation (Do I need a Z there or yanks? ). I still don't understand what made him think that..
C
ChrisFrost
Esoteric aerial rigs aside, the most likely reason for two aerial is because the householder wanted the cheapest way to get a signal in to a second room. Simples.It's what I said in post #4 a week ago.
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