Planning for outdoor tv signal splitting - advice appreciated

I work at an outdoor venue in the centre of London, and we're looking
to show the Royal Wedding on some screens we have. We plan on getting
an aerial from Screwfix/Maplin/CPC, a distribution amp, and the Y-
splits at the end of 10m or so of coax cables for a pair of screens.
We have 6 pairs of screens with amongst other things coax input
Any advice on what kind of kit to get would be greatly appreciated, or
advice telling us we're crazy, but as long as it also tells us how to
be less crazy.

In message
on Mon, 25 Apr 2011 12:04:17 -0700 (PDT)
tin_man_ wrote:

I work at an outdoor venue in the centre of London, and we're looking
to show the Royal Wedding on some screens we have. We plan on getting
an aerial from Screwfix/Maplin/CPC, a distribution amp, and the Y-
splits at the end of 10m or so of coax cables for a pair of screens.
We have 6 pairs of screens with amongst other things coax input
Any advice on what kind of kit to get would be greatly appreciated, or
advice telling us we're crazy, but as long as it also tells us how to
be less crazy.

You do seem to have left things until the last minute ...!

Central London tends to be full of tall buildings which can make TV reception
rather difficult unless, of course, your aerial is on top of one of the
buildings - but that requires considerably more than 10m of cable ...

Perhaps you can supply a bit more detail? Where are you?[1] Where do you
propose to put your aerial and what can you see between the proposed aerial
location and Crystal Palace?

you say "We have 6 pairs of screens with amongst other things coax input".
Well, you will obviously need the coax input for the RF feed so can we take it
that these 'screens' are, in fact, TV receivers - albeit large ones?

And what type? Are they analogue of digital (Freeview) - or both?

[1] Usually a rough area is sufficient for most queries here but in your case I
would think that you will need to supply some very accurate information if you
are expecting to get useful replies!

--

Terry

On Monday, April 25th, 2011 at 12:04:17h -0700, Tin_Man_ explained:

I work at an outdoor venue in the centre of London, and we're looking to
show the Royal Wedding on some screens we have.

Will these screens be appropriately licenced to display broadcast television
pictures?

In article , Terry
Casey wrote:
In message
on
Mon, 25 Apr 2011 12:04:17 -0700 (PDT) tin_man_
wrote:

I work at an outdoor venue in the centre of London, and we're looking
to show the Royal Wedding on some screens we have. We plan on getting
an aerial from Screwfix/Maplin/CPC, a distribution amp, and the Y-
splits at the end of 10m or so of coax cables for a pair of screens. We
have 6 pairs of screens with amongst other things coax input Any advice
on what kind of kit to get would be greatly appreciated, or advice
telling us we're crazy, but as long as it also tells us how to be less
crazy.

You do seem to have left things until the last minute ...!

Central London tends to be full of tall buildings which can make TV
reception rather difficult unless, of course, your aerial is on top of
one of the buildings - but that requires considerably more than 10m of
cable ...

Yes, I remember at Grosvenor House, for IBC in the 70s, we used a full 100m
drum of co-ax to get to the basement - but still needed 20dB of attenuation
in teh feed to an early Ceefax set.

--
From KT24

Using a RISC OS computer running v5.16

tin_man_ wrote:
I work at an outdoor venue in the centre of London, and we're looking
to show the Royal Wedding on some screens we have. We plan on getting
an aerial from Screwfix/Maplin/CPC, a distribution amp, and the Y-
splits at the end of 10m or so of coax cables for a pair of screens.
We have 6 pairs of screens with amongst other things coax input
Any advice on what kind of kit to get would be greatly appreciated, or
advice telling us we're crazy, but as long as it also tells us how to
be less crazy.
Do a quick check first if you can to make sure you can get a decent
signal. If so I'd use a log periodic aerial (small, directional, easy to
rig).

If the signal is good you might be better just buying three aerials and
locating one with each pair of screens.

If the signal is really bad (big towers might be in the way) I suggest
you buy three cheap Freesat kits and use each to feed two screens via
HDMI or SCART. Obviously that implies that there is a view towards the
satellite at each of the three locations.

Other permutations are of course possible.

Bill

"tin_man_" wrote in message ...
I work at an outdoor venue in the centre of London, and we're looking
to show the Royal Wedding on some screens we have. We plan on getting
an aerial from Screwfix/Maplin/CPC, a distribution amp, and the Y-
splits at the end of 10m or so of coax cables for a pair of screens.
We have 6 pairs of screens with amongst other things coax input
Any advice on what kind of kit to get would be greatly appreciated, or
advice telling us we're crazy, but as long as it also tells us how to
be less crazy.

Of the three places you mentioned I think only CPC will supply the correct
Group A aerial for CP.
Exactly where about in Central London is this venue and how high up are
you going to be able to mount the aerials.

I wouldn't have thought that a display screen bright enough for daylight outdoor viewing
would come equipped with a built in tuner, BICBW.
Were you just going to use the analogue signals from CP? That's a luxury many of us
no longer have, and I'm sceptical if you will be able to provide ghost free analogue
or error free digital under those conditions in central London, Satellite may well be more viable.

--
Graham.

%Profound_observation%

"tin_man_" wrote in message
...
I work at an outdoor venue in the centre of London, and we're looking
to show the Royal Wedding on some screens we have. We plan on getting
an aerial from Screwfix/Maplin/CPC, a distribution amp, and the Y-
splits at the end of 10m or so of coax cables for a pair of screens.
We have 6 pairs of screens with amongst other things coax input
Any advice on what kind of kit to get would be greatly appreciated, or
advice telling us we're crazy, but as long as it also tells us how to
be less crazy.

The requirement is a bit vague, however if you can see the Clarke belt from
the location(s) then I would recommend the satellite solution suggested by
others.

You don't mention a size, but LG made nnLF7700 (nn = 32, 37, 42, 47 inches
(might be dim outdoors)) with a Freesat HD receiver built in - try ringing
Richer Sounds for an end of line deal. All you need as well is a cheap dish
with a dual LNB per position.

And if he can see the sat, then this might well be better than trying to get
decent freeview with a low aeriel.

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!
"Terry Casey" wrote in message
...
In message

on Mon, 25 Apr 2011 12:04:17 -0700 (PDT)
tin_man_ wrote:

I work at an outdoor venue in the centre of London, and we're looking
to show the Royal Wedding on some screens we have. We plan on getting
an aerial from Screwfix/Maplin/CPC, a distribution amp, and the Y-
splits at the end of 10m or so of coax cables for a pair of screens.
We have 6 pairs of screens with amongst other things coax input
Any advice on what kind of kit to get would be greatly appreciated, or
advice telling us we're crazy, but as long as it also tells us how to
be less crazy.

You do seem to have left things until the last minute ...!

Central London tends to be full of tall buildings which can make TV
reception
rather difficult unless, of course, your aerial is on top of one of the
buildings - but that requires considerably more than 10m of cable ...

Perhaps you can supply a bit more detail? Where are you?[1] Where do you
propose to put your aerial and what can you see between the proposed
aerial
location and Crystal Palace?

you say "We have 6 pairs of screens with amongst other things coax input".
Well, you will obviously need the coax input for the RF feed so can we
take it
that these 'screens' are, in fact, TV receivers - albeit large ones?

And what type? Are they analogue of digital (Freeview) - or both?

[1] Usually a rough area is sufficient for most queries here but in your
case I
would think that you will need to supply some very accurate information if
you
are expecting to get useful replies!

--

Terry

On Tuesday, April 26th, 2011 at 08:56:34h +0100,
Brian Gaff wrote:

And if he can see the sat

Would he not need a telescope for that?