UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions.

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 7
Default Enhancing off boom tv signals?

I have a loft aerial (Yagi type (9 verical elements; 2 reflectors,
wideband, directional, and connected to a distribution amplifier)
pointing towards a transmitter (relay) and get good reception (high S
and High Q).

On occasions, usually in the early morning (say 2am), I can receive
some signals from another transmitter that I believe is about 90
degrees to the boom (parent). These signals are not transmitted from
the relay. At other times during the day this signal (parent) is very
weak and unwatchable.

My question is: Is it possible to enahance these weak signals at 90
degrees with little effect to the forward direction?

I would be reluctant to alter the position of the aerial due to my
current exellent reception, and the difficulties of working in the
loft.

It would not be possible to point the aerial at the main transmitter
from the current installation. The best I could do would be to point
the aerial between the transmitters (almost certainy lose all
reception). Although I can receive some signals from the main
transmitter, I am not confident that I would be able to receive all
the multiplexes. People around me all use the local relay transmitter
because of geographical considerations.

Any DIY suggestions?

Thanks
  #2   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 39,563
Default Enhancing off boom tv signals?

species8350 wrote:
I have a loft aerial (Yagi type (9 verical elements; 2 reflectors,
wideband, directional, and connected to a distribution amplifier)
pointing towards a transmitter (relay) and get good reception (high S
and High Q).

On occasions, usually in the early morning (say 2am), I can receive
some signals from another transmitter that I believe is about 90
degrees to the boom (parent). These signals are not transmitted from
the relay. At other times during the day this signal (parent) is very
weak and unwatchable.

My question is: Is it possible to enahance these weak signals at 90
degrees with little effect to the forward direction?


we have already been over this.

NO not without ultra special kit.

And its a stupid idea anyway. If you want to recieve that transmitter
fit an aerial to do it and then combine the tow outputs properly.


I would be reluctant to alter the position of the aerial due to my
current exellent reception, and the difficulties of working in the
loft.

It would not be possible to point the aerial at the main transmitter
from the current installation. The best I could do would be to point
the aerial between the transmitters (almost certainy lose all
reception). Although I can receive some signals from the main
transmitter, I am not confident that I would be able to receive all
the multiplexes. People around me all use the local relay transmitter
because of geographical considerations.

Any DIY suggestions?

fit another aerial and combine it

Thanks



--
To people who know nothing, anything is possible.
To people who know too much, it is a sad fact
that they know how little is really possible -
and how hard it is to achieve it.
  #3   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 40,893
Default Enhancing off boom tv signals?

wrote

I have a loft aerial (Yagi type (9 verical elements; 2 reflectors,
wideband, directional, and connected to a distribution amplifier)
pointing towards a transmitter (relay) and get good reception (high S
and High Q).


On occasions, usually in the early morning (say 2am), I can receive
some signals from another transmitter that I believe is about 90
degrees to the boom (parent). These signals are not transmitted from
the relay. At other times during the day this signal (parent) is very
weak and unwatchable.


My question is: Is it possible to enahance these weak signals
at 90 degrees with little effect to the forward direction?


Its theoretically possible to have another antenna pointing at the
parent and have a combiner combining the outputs of the two antennas.

I would be reluctant to alter the position of the aerial due to my
current exellent reception, and the difficulties of working in the loft.


It would not be possible to point the aerial at the main transmitter
from the current installation. The best I could do would be to point
the aerial between the transmitters (almost certainy lose all
reception). Although I can receive some signals from the main
transmitter, I am not confident that I would be able to receive all
the multiplexes. People around me all use the local relay transmitter
because of geographical considerations.


Any DIY suggestions?



  #4   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 10,998
Default Enhancing off boom tv signals?

Another aerial. This other transmitter is probably not vertically polarised
and maybe on a different part of the band. So shove up another aerial and
have a switch, One issue of course is that Freeview seems unable to cope
sensibly with duplicates, throwing them up on channels above 800, or more
worryingly getting them all muddled up so some are from one site and some
from the other one.
Brian

--
Brian Gaff -
Note:- In order to reduce spam, any email without 'Brian Gaff'
in the display name may be lost.
Blind user, so no pictures please!
"species8350" wrote in message
...
I have a loft aerial (Yagi type (9 verical elements; 2 reflectors,
wideband, directional, and connected to a distribution amplifier)
pointing towards a transmitter (relay) and get good reception (high S
and High Q).

On occasions, usually in the early morning (say 2am), I can receive
some signals from another transmitter that I believe is about 90
degrees to the boom (parent). These signals are not transmitted from
the relay. At other times during the day this signal (parent) is very
weak and unwatchable.

My question is: Is it possible to enahance these weak signals at 90
degrees with little effect to the forward direction?

I would be reluctant to alter the position of the aerial due to my
current exellent reception, and the difficulties of working in the
loft.

It would not be possible to point the aerial at the main transmitter
from the current installation. The best I could do would be to point
the aerial between the transmitters (almost certainy lose all
reception). Although I can receive some signals from the main
transmitter, I am not confident that I would be able to receive all
the multiplexes. People around me all use the local relay transmitter
because of geographical considerations.

Any DIY suggestions?

Thanks



  #5   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 6,896
Default Enhancing off boom tv signals?

In article
s.com, species8350 scribeth thus
I have a loft aerial (Yagi type (9 verical elements; 2 reflectors,
wideband, directional, and connected to a distribution amplifier)
pointing towards a transmitter (relay) and get good reception (high S
and High Q).

On occasions, usually in the early morning (say 2am), I can receive
some signals from another transmitter that I believe is about 90
degrees to the boom (parent). These signals are not transmitted from
the relay. At other times during the day this signal (parent) is very
weak and unwatchable.

My question is: Is it possible to enahance these weak signals at 90
degrees with little effect to the forward direction?

I would be reluctant to alter the position of the aerial due to my
current exellent reception, and the difficulties of working in the
loft.

It would not be possible to point the aerial at the main transmitter
from the current installation. The best I could do would be to point
the aerial between the transmitters (almost certainy lose all
reception). Although I can receive some signals from the main
transmitter, I am not confident that I would be able to receive all
the multiplexes. People around me all use the local relay transmitter
because of geographical considerations.

Any DIY suggestions?

Thanks


You have posted this on cam.misc and got some sensible answers there.

I did ask you if you could tell us which transmitters are in use then
you could get some sensible practical answers.

Sometimes but very rarely this can be done, but posting in the ng you
originally did if you are in that area a simple Y combiner will be
asking for trouble most all of the time.

If however if you are somewhere else then it "could" be done but you'd
need to go the right way about it.

Your best bet is to tell us where you are located and what transmitters
you are attempting to receive until you have done that there isn't any
really useful help to be had!...


--
Tony Sayer



  #6   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 6,896
Default Enhancing off boom tv signals?

Any DIY suggestions?

Thanks


As others have said, get a second aerial and direct it at the other
transmitter, and combine the outputs from the two aerials. But it's
not that simple in practice. I was / still am thinking of doing this
for myself. There's a recent thread on uk.tech.digital-tv entitled
'Coax Y adapter query' where the pitfalls and correct way of doing it
are discussed at length.


Quite .. but you need to know what transmitters you are trying to
combine.

And where they are located and where you are located relative to them..


--
Tony Sayer

  #7   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 7
Default Enhancing off boom tv signals?

On Apr 21, 7:24*am, "Brian Gaff" wrote:
Another aerial. This other transmitter is probably not vertically polarised
and maybe on a different part of the band. So shove up another aerial and
have a switch, One issue of course is that Freeview seems unable to cope
sensibly with duplicates, throwing them up on channels above 800, or more
worryingly getting them all muddled up so some are from one site and some
from the other one.
*Brian

--
Brian Gaff -
Note:- In order to reduce spam, any email without 'Brian Gaff'
in the display name may be lost.
Blind user, so no pictures please!"species8350" wrote in message

...


Yes, This is one of my fears.



  #8   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 7
Default Enhancing off boom tv signals?


As others have said, get a second aerial and direct it at the other
transmitter, and combine the outputs from the two aerials. But it's
not that simple in practice. I was / still am thinking of doing this
for myself. There's a recent thread on uk.tech.digital-tv entitled
'Coax Y adapter query' where the pitfalls and correct way of doing it
are discussed at length.

--

Chris


Thanks for the tip. As you say, this is not without problems

  #9   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 7
Default Enhancing off boom tv signals?

On Apr 21, 12:14*pm, tony sayer wrote:
In article
s.com, species8350 scribeth thus





I have a loft aerial (Yagi type (9 verical elements; 2 reflectors,
wideband, directional, and connected to a distribution amplifier)
pointing towards a transmitter (relay) and get good reception (high S
and High Q).


On occasions, usually in the early morning (say 2am), I can *receive
some signals from another transmitter that I believe is about 90
degrees to the boom (parent). These signals are not transmitted from
the relay. At other times during the day this signal (parent) is very
weak and unwatchable.


My question is: Is it possible to enahance these weak signals at 90
degrees with little effect to the forward direction?


I would be reluctant to alter the position of the aerial due to my
current exellent reception, and the difficulties of working in the
loft.


It would not be possible to point the aerial at the main transmitter
from the current installation. *The best I could do would be to point
the aerial between the transmitters (almost certainy lose all
reception). Although I can receive some signals from the main
transmitter, I am not confident that I would be able to receive all
the multiplexes. People around me all use the local relay transmitter
because of geographical considerations.


Any DIY suggestions?


Thanks


You have posted this on cam.misc and got some sensible answers there.

I did ask you if you could tell us which transmitters are in use then
you could get some sensible practical answers.

Sometimes but very rarely this can be done, but posting in the ng you
originally did if you are in that area a simple Y combiner will be
asking for trouble most all of the time.

If however if you are somewhere else then it "could" be done but you'd
need to go the right way about it.

Your best bet is to tell us where you are located and what transmitters
you are attempting to receive until you have done that there isn't any
really useful help to be had!...

--
Tony Sayer


I have a reasonable knowledge regarding the transmitters, locations,
polarisations, powers, etc, etc. I tend to post to a number of groups
since some people read some, but not other groups. Hence, I hope to
gain as much information as possible, as this helps me learn, and make
better judgements.

Best wishes.
  #10   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 7
Default Enhancing off boom tv signals?

On Apr 21, 4:35*am, The Natural Philosopher
wrote:
species8350 wrote:
I have a loft aerial (Yagi type (9 verical elements; 2 reflectors,
wideband, directional, and connected to a distribution amplifier)
pointing towards a transmitter (relay) and get good reception (high S
and High Q).


On occasions, usually in the early morning (say 2am), I can *receive
some signals from another transmitter that I believe is about 90
degrees to the boom (parent). These signals are not transmitted from
the relay. At other times during the day this signal (parent) is very
weak and unwatchable.


My question is: Is it possible to enahance these weak signals at 90
degrees with little effect to the forward direction?


we have already been over this.

NO not without ultra special kit.

And its a stupid idea anyway. If you want to recieve that transmitter
fit an aerial to do it and then combine the tow outputs properly.


This question is really addressed to those who have not commented
previously.




  #11   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 2,688
Default Enhancing off boom tv signals?

tony sayer wrote:

scribeth thus

Is it possible to enahance these weak signals at 90
degrees with little effect to the forward direction?

You have posted this on cam.misc and got some sensible answers there.


Also on u.t.d-tv a few weeks ago.
  #12   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 3,155
Default Enhancing off boom tv signals?

In article
,
species8350 wrote:
On Apr 21, 4:35 am, The Natural Philosopher
wrote:
species8350 wrote:
I have a loft aerial (Yagi type (9 verical elements; 2 reflectors,
wideband, directional, and connected to a distribution amplifier)
pointing towards a transmitter (relay) and get good reception (high S
and High Q).


On occasions, usually in the early morning (say 2am), I can receive
some signals from another transmitter that I believe is about 90
degrees to the boom (parent). These signals are not transmitted from
the relay. At other times during the day this signal (parent) is very
weak and unwatchable.


My question is: Is it possible to enahance these weak signals at 90
degrees with little effect to the forward direction?


we have already been over this.

NO not without ultra special kit.

And its a stupid idea anyway. If you want to recieve that transmitter
fit an aerial to do it and then combine the tow outputs properly.


This question is really addressed to those who have not commented
previously.


But those with the specialised knowledge were on the previous newsgroup.
You were told how to proceed - or are you trying to wind everybody up?

--
From KT24

Using a RISC OS computer running v5.18

  #13   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 39,563
Default Enhancing off boom tv signals?

charles wrote:
In article
,
species8350 wrote:
On Apr 21, 4:35 am, The Natural Philosopher
wrote:
species8350 wrote:
I have a loft aerial (Yagi type (9 verical elements; 2 reflectors,
wideband, directional, and connected to a distribution amplifier)
pointing towards a transmitter (relay) and get good reception (high S
and High Q).
On occasions, usually in the early morning (say 2am), I can receive
some signals from another transmitter that I believe is about 90
degrees to the boom (parent). These signals are not transmitted from
the relay. At other times during the day this signal (parent) is very
weak and unwatchable.
My question is: Is it possible to enahance these weak signals at 90
degrees with little effect to the forward direction?
we have already been over this.

NO not without ultra special kit.

And its a stupid idea anyway. If you want to recieve that transmitter
fit an aerial to do it and then combine the tow outputs properly.


This question is really addressed to those who have not commented
previously.


But those with the specialised knowledge were on the previous newsgroup.
You were told how to proceed - or are you trying to wind everybody up?

I think he must be an example of the classic Labour/Green voter. If you
go one asking the same question long enough, eventually someone will
give you the answer that you want to hear, at a very expensive price.

It won't naturally *work*, but it will make you feel better.

--
To people who know nothing, anything is possible.
To people who know too much, it is a sad fact
that they know how little is really possible -
and how hard it is to achieve it.
  #14   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 6,896
Default Enhancing off boom tv signals?

In article
..com, species8350 scribeth thus
On Apr 21, 12:14*pm, tony sayer wrote:
In article
s.com, species8350 scribeth thus





I have a loft aerial (Yagi type (9 verical elements; 2 reflectors,
wideband, directional, and connected to a distribution amplifier)
pointing towards a transmitter (relay) and get good reception (high S
and High Q).


On occasions, usually in the early morning (say 2am), I can *receive
some signals from another transmitter that I believe is about 90
degrees to the boom (parent). These signals are not transmitted from
the relay. At other times during the day this signal (parent) is very
weak and unwatchable.


My question is: Is it possible to enahance these weak signals at 90
degrees with little effect to the forward direction?


I would be reluctant to alter the position of the aerial due to my
current exellent reception, and the difficulties of working in the
loft.


It would not be possible to point the aerial at the main transmitter
from the current installation. *The best I could do would be to point
the aerial between the transmitters (almost certainy lose all
reception). Although I can receive some signals from the main
transmitter, I am not confident that I would be able to receive all
the multiplexes. People around me all use the local relay transmitter
because of geographical considerations.


Any DIY suggestions?


Thanks


You have posted this on cam.misc and got some sensible answers there.

I did ask you if you could tell us which transmitters are in use then
you could get some sensible practical answers.

Sometimes but very rarely this can be done, but posting in the ng you
originally did if you are in that area a simple Y combiner will be
asking for trouble most all of the time.

If however if you are somewhere else then it "could" be done but you'd
need to go the right way about it.

Your best bet is to tell us where you are located and what transmitters
you are attempting to receive until you have done that there isn't any
really useful help to be had!...

--
Tony Sayer


I have a reasonable knowledge regarding the transmitters, locations,
polarisations, powers, etc, etc. I tend to post to a number of groups
since some people read some, but not other groups. Hence, I hope to
gain as much information as possible, as this helps me learn, and make
better judgements.

Best wishes.


So is there any reason then why you can't or don't want to tell anyone
what the transmitters involved are?...
--
Tony Sayer

  #15   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 2,688
Default Enhancing off boom tv signals?

tony sayer wrote:

So is there any reason then why you can't or don't want to tell anyone
what the transmitters involved are?...


saltdene and whitehawk



  #16   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 7
Default Enhancing off boom tv signals?

But those with the specialised knowledge were on the previous newsgroup.
You were told how to proceed - or are you trying to wind everybody up?


Definately not.

Just trying to gain as much knowledge as possible
  #17   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 7
Default Enhancing off boom tv signals?

On Apr 21, 2:24*pm, tony sayer wrote:
In article
.com, species8350 scribeth thus





On Apr 21, 12:14*pm, tony sayer wrote:
In article
s.com, species8350 scribeth thus


I have a loft aerial (Yagi type (9 verical elements; 2 reflectors,
wideband, directional, and connected to a distribution amplifier)
pointing towards a transmitter (relay) and get good reception (high S
and High Q).


On occasions, usually in the early morning (say 2am), I can *receive
some signals from another transmitter that I believe is about 90
degrees to the boom (parent). These signals are not transmitted from
the relay. At other times during the day this signal (parent) is very
weak and unwatchable.


My question is: Is it possible to enahance these weak signals at 90
degrees with little effect to the forward direction?


I would be reluctant to alter the position of the aerial due to my
current exellent reception, and the difficulties of working in the
loft.


It would not be possible to point the aerial at the main transmitter
from the current installation. *The best I could do would be to point
the aerial between the transmitters (almost certainy lose all
reception). Although I can receive some signals from the main
transmitter, I am not confident that I would be able to receive all
the multiplexes. People around me all use the local relay transmitter
because of geographical considerations.


Any DIY suggestions?


Thanks


You have posted this on cam.misc and got some sensible answers there.


I did ask you if you could tell us which transmitters are in use then
you could get some sensible practical answers.


Sometimes but very rarely this can be done, but posting in the ng you
originally did if you are in that area a simple Y combiner will be
asking for trouble most all of the time.


If however if you are somewhere else then it "could" be done but you'd
need to go the right way about it.


Your best bet is to tell us where you are located and what transmitters
you are attempting to receive until you have done that there isn't any
really useful help to be had!...


--
Tony Sayer


I have a reasonable knowledge regarding the transmitters, locations,
polarisations, powers, etc, etc. I tend to post to a number of groups
since some people read some, but not other groups. Hence, I hope to
gain as much information as possible, as this helps me learn, and make
better judgements.


Best wishes.


So is there any reason then why you can't or don't want to *tell anyone
what the transmitters involved are?...
--
Tony Sayer


Only that I don't see the point.

I think I have enough knowledge regarding the transmitters.
  #18   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 2,040
Default Enhancing off boom tv signals?

On 21/04/2012 16:50, species8350 wrote:

So is there any reason then why you can't or don't want to tell anyone
what the transmitters involved are?...
--
Tony Sayer


Only that I don't see the point.

I think I have enough knowledge regarding the transmitters.


If you are going to all this trouble to get extra region channels, why
not just put up a freesat dish and get 'em that way? Reception quality
will be better.

£100 all in, for an installer to visit, fit a dish and leave you with a
HD freesat receiver. Or DIY....

--
Adrian C
  #19   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 3,155
Default Enhancing off boom tv signals?

In article
,
species8350 wrote:
On Apr 21, 2:24 pm, tony sayer wrote:

So is there any reason then why you can't or don't want to tell anyone
what the transmitters involved are?...
--
Tony Sayer


Only that I don't see the point.


I think I have enough knowledge regarding the transmitters.


but, how you should go about your project depends on the channels in use.
If you want proper help, then you need to say which transmitters are
involved.

--
From KT24

Using a RISC OS computer running v5.18

  #20   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 6,896
Default Enhancing off boom tv signals?

I have a reasonable knowledge regarding the transmitters, locations,
polarisations, powers, etc, etc. I tend to post to a number of groups
since some people read some, but not other groups. Hence, I hope to
gain as much information as possible, as this helps me learn, and make
better judgements.


Best wishes.


So is there any reason then why you can't or don't want to *tell anyone
what the transmitters involved are?...
--
Tony Sayer


Only that I don't see the point.

I think I have enough knowledge regarding the transmitters.


Well if we knew what you know then we might be able to help you
better;!..


However for the benefit of other curious UK DIY'ites


Someone in another reply suggested these might be Whitehawk Hill and
Saltdean. Now if that is the case it seems to me to be rather pointless
as they both will carry the same programmes as I believe that Saltdean
is a relay of Whitehawk Hill. Thats to say it receives that station and
frequency converts it to other channels and re transmits what its
receiving..

Here and there..

http://tx.mb21.co.uk/gallery/gallerypage.php?txid=565

http://tx.mb21.co.uk/gallery/gallerypage.php?txid=573

And those channels are rather close together in frequency terms.

Now say you were in a location where you received a rather strong signal
from a Main station. And that station was say in what's called Group A
thats from channels 21 to 34. Lets call that the "Local" aerial.

Now if your more "distant" (lets refer to that as the distant from now
on) station was in the SAME aerial group and you did a simple "resistive
splitter" arrangement and connected another aerial in group A again to
that you'd very likely have the following problem. The local transmitter
will now be picked up by the "distant" aerial, and the signals from that
will be added to the one being picked up by the "local" aerial.

Now the phase of the two signals will be different and they will take
differing paths from the transmitter to reach your TV. This can result
in constructive and destructive interference thats where the signals
will add and subtract due to the phase differences let alone the time
delays. The Digital TV system will cope with some of that but not what
your now likely to be presenting your TV with!. In analogue times this
would have caused very bad "ghosting".

Consider the distant station. Now apart from the weaker signals from
that your adding in the local much stronger signal and most likely that
will "swamp" the input of your TV and it may have a hard time actually
receiving the signals receiving the weaker signals on almost the same
channels.

We had this problem in Cambridge many years ago. Some people wanted the
extra, in those days!, films that ITV London transmitted. Now thats
carried by the main station at Crystal place in London. The local ITV
came from Sandy Heath they both used channels in aerial group A and as
the London signals were very weak you had to use an amplifier. Now
combine that lot together and the results wouldn't work!.

Now take a different scenario.

If your distant was up in group C say channels 50 to 60 odd for example
then you are in a better position because you can filter the input from
each aerial thats to say only allow group A signals thru from that
aerial aimed at the A group transmitter and you can filter the distant
aerial and signals therefrom so they can be separated as it where. Also
your distant will pick up some reflected signals from the local
transmitter but as its filtered these do not add and upset reception of
that station.

Also when your TV is trying to receive the group C signals its now
presented with very strong channel at the that frequency and can thus
differentiate those better so this may now become possible.

Now if you start adding amplifiers without carefully considering their
effects you can easily overload them and cause what's called
intermodulation which will produce spurious signals up and down the band
and present your TV with phantom signals which lets say, will upset it!.

Thats more or less what you need to know, of course there will be some
odd instances where thats not strictly correct, but for the main
part....

--
Tony Sayer




  #21   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 40,893
Default Enhancing off boom tv signals?



"species8350" wrote in message
...
On Apr 21, 12:14 pm, tony sayer wrote:
In article
s.com, species8350 scribeth thus





I have a loft aerial (Yagi type (9 verical elements; 2 reflectors,
wideband, directional, and connected to a distribution amplifier)
pointing towards a transmitter (relay) and get good reception (high S
and High Q).


On occasions, usually in the early morning (say 2am), I can receive
some signals from another transmitter that I believe is about 90
degrees to the boom (parent). These signals are not transmitted from
the relay. At other times during the day this signal (parent) is very
weak and unwatchable.


My question is: Is it possible to enahance these weak signals at 90
degrees with little effect to the forward direction?


I would be reluctant to alter the position of the aerial due to my
current exellent reception, and the difficulties of working in the
loft.


It would not be possible to point the aerial at the main transmitter
from the current installation. The best I could do would be to point
the aerial between the transmitters (almost certainy lose all
reception). Although I can receive some signals from the main
transmitter, I am not confident that I would be able to receive all
the multiplexes. People around me all use the local relay transmitter
because of geographical considerations.


Any DIY suggestions?


Thanks


You have posted this on cam.misc and got some sensible answers there.

I did ask you if you could tell us which transmitters are in use then
you could get some sensible practical answers.

Sometimes but very rarely this can be done, but posting in the ng you
originally did if you are in that area a simple Y combiner will be
asking for trouble most all of the time.

If however if you are somewhere else then it "could" be done but you'd
need to go the right way about it.

Your best bet is to tell us where you are located and what transmitters
you are attempting to receive until you have done that there isn't any
really useful help to be had!...

--
Tony Sayer


I have a reasonable knowledge regarding the transmitters, locations,
polarisations, powers, etc, etc. I tend to post to a number of groups
since some people read some, but not other groups.


Its better to put all the groups in the groups field rather
than to post separate posts to each group when you do.

That way someone who reads both groups sees the second
copy marked as read with a decent news reader and everyone
can see what other groups its been posted to etc.

Hence, I hope to gain as much information as possible,
as this helps me learn, and make better judgements.


Sure, particularly now that usenet is much quieter
than it used to be, that does make a lot of sense now.

  #22   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 2,688
Default Enhancing off boom tv signals?

tony sayer wrote:

Someone in another reply suggested these might be Whitehawk Hill and
Saltdean. Now if that is the case it seems to me to be rather pointless
as they both will carry the same programmes as I believe that Saltdean
is a relay of Whitehawk Hill.


Except Saltdean (from which the O/P receives good signal with direct
line of sight) is 3 mux Freeview-Lite, but Whitehawk Hill (90 degrees
off beam and believed to be skimming the hilltops) is the full 6 mux
Freeview.
  #23   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 6,896
Default Enhancing off boom tv signals?

In article , Andy
Burns scribeth thus
tony sayer wrote:

Someone in another reply suggested these might be Whitehawk Hill and
Saltdean. Now if that is the case it seems to me to be rather pointless
as they both will carry the same programmes as I believe that Saltdean
is a relay of Whitehawk Hill.


Except Saltdean (from which the O/P receives good signal with direct
line of sight) is 3 mux Freeview-Lite, but Whitehawk Hill (90 degrees
off beam and believed to be skimming the hilltops) is the full 6 mux
Freeview.


Yes one of the well thought out aspects of UK Digital TV;!..

Well if I were him I'd do my best to get the best aerial I could onto
Whitehawk Hill which will almost certainly mean putting it outside and a
high gain one to boot. Theres really nothing you can add onto an
existing IIRC loft aerial thats say 90 deg off beam to improve matters.
Amplify it and you'll more then likely run into intermod problems..

Or do as another poster suggested go Freesat an ex Sky box with a
freesat card is a DIY project, the sat dish as long as it can "see" the
sats and you could do that in a back garden if it was clear line of
sight to the right bit of the sky, would be a very good alternative!...

As some people are starting to do faced with the lack of full DTV
coverage..
--
Tony Sayer




  #24   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 1,958
Default Enhancing off boom tv signals?

On Sat, 21 Apr 2012 14:24:36 +0100, tony sayer wrote:

So is there any reason then why you can't or don't want to tell anyone
what the transmitters involved are?...


And why isn't he crossposting so everyone in the disparte groups can
see all the answers?

Ah Google Groups say no more...

--
Cheers
Dave.



  #25   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 6,896
Default Enhancing off boom tv signals?

In article o.uk, Dave
Liquorice scribeth thus
On Sat, 21 Apr 2012 14:24:36 +0100, tony sayer wrote:

So is there any reason then why you can't or don't want to tell anyone
what the transmitters involved are?...


And why isn't he crossposting so everyone in the disparte groups can
see all the answers?

Ah Google Groups say no more...


I think it's now known why the original query was originated;!...
--
Tony Sayer






  #26   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 2,688
Default Enhancing off boom tv signals?

tony sayer wrote:

I think it's now known why the original query was originated;!...


Presume he'll ask in uk.local.sussex in a few weeks time ;-)

Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Enhancing a sled for smooth gliding Ignoramus4804 Metalworking 26 December 30th 10 10:16 PM
Welding Penetration Enhancing Compounds ssancak Metalworking 2 October 22nd 07 03:24 AM
RF Signals Himszy Electronics 2 March 20th 05 03:44 AM
alarm signals cynders Home Ownership 0 February 2nd 05 08:54 PM


All times are GMT +1. The time now is 09:35 AM.

Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 DIYbanter.
The comments are property of their posters.
 

About Us

"It's about DIY & home improvement"