Hi

I'm planning on getting a Freeview TV. This will be the first TV I've had
in six years. I'm getting clearer about the actual TV I want and generally
I'm feeling quite good about that part.

The question really is what to do about radio. Currently I have a rather
good FM tuner in my living room and a Tivoli radio in my bedroom. Both of
these get the signal from a single FM aerial on a mast on my roof.

The FM aerial is an FM1083 Antiference all the cabling is CT100.

To get Freeview I want to put up an aerial suitable for DTT. If I want to
stick with the FM tuner then it's easy, I've learned that all I need to do
is use a diplexer. However, while I'm up on my roof it has occurred to me
that I should put a DAB aerial up there as well. This would mean that I'd
be completely covered, pretty much. If I decide to get a DAB radio then
I'll have the aerial already there.

So, my question is: can I put the signals from the three aerials down the
single CT100 cable?

For this would I need two diplexers or something?

Thank you

--
Patrick - Hove, UK
If you wish email me from my web-site: http://www.patrickjames.me.uk

"patrick j" wrote in message
al.Net...
Hi

I'm planning on getting a Freeview TV. This will be the first TV I've had
in six years. I'm getting clearer about the actual TV I want and generally
I'm feeling quite good about that part.

The question really is what to do about radio. Currently I have a rather
good FM tuner in my living room and a Tivoli radio in my bedroom. Both of
these get the signal from a single FM aerial on a mast on my roof.

The FM aerial is an FM1083 Antiference all the cabling is CT100.

To get Freeview I want to put up an aerial suitable for DTT. If I want to
stick with the FM tuner then it's easy, I've learned that all I need to do
is use a diplexer. However, while I'm up on my roof it has occurred to me
that I should put a DAB aerial up there as well. This would mean that I'd
be completely covered, pretty much. If I decide to get a DAB radio then
I'll have the aerial already there.

So, my question is: can I put the signals from the three aerials down the
single CT100 cable?

For this would I need two diplexers or something?
Yes.
Triplexers are made for the purpose, but if you are cabling
several rooms, then separate cables from the aerials to a loftbox
distribution amplifier might be more logical.

--
Graham.
%Profound_observation%

"Graham." wrote in message
...
Triplexers are made for the purpose, but if you are cabling
several rooms, then separate cables from the aerials to a loftbox
distribution amplifier might be more logical.

Because the loftbox or other amplifier will have three separate inputs.

Bill

On Mon, 27 Aug 2007 14:52:35 +0100, "Bill Wright"
wrote:


"Graham." wrote in message
...
Triplexers are made for the purpose, but if you are cabling
several rooms, then separate cables from the aerials to a loftbox
distribution amplifier might be more logical.

Because the loftbox or other amplifier will have three separate inputs.

Bill


As the others have said, if you're distributing using a loftbox, have
three separate cables going into the loft and into the 3 inputs on the
loftbox and then distribute the combined signal throughout the house.
If you're only feeding one room, then a triplexer can be used to
combine all three aerials. Please note that three separate cables is
better than using a triplexer, as there is some loss in signal. Also
note that to separate the signals in your lounge (or wherever) it's
best to use a proper triplexer/splitter rather than a standard
splitter or there will be further loss of signal.

BTW, I have used triplexers with great success.

Marky P.

Make sure, if you use a triplexer and a seperate distribution amp that
the amp covers the full FM/DAB/UHF bands.

Some have inputs for UHF and FM but dont cover DAB onto either of
these inputs.

"patrick j" wrote in message
al.Net...
Hi

I'm planning on getting a Freeview TV. This will be the first TV I've had
in six years. I'm getting clearer about the actual TV I want and generally
I'm feeling quite good about that part.

The question really is what to do about radio. Currently I have a rather
good FM tuner in my living room and a Tivoli radio in my bedroom. Both of
these get the signal from a single FM aerial on a mast on my roof.

The FM aerial is an FM1083 Antiference all the cabling is CT100.

To get Freeview I want to put up an aerial suitable for DTT. If I want to
stick with the FM tuner then it's easy, I've learned that all I need to do
is use a diplexer. However, while I'm up on my roof it has occurred to me
that I should put a DAB aerial up there as well. This would mean that I'd
be completely covered, pretty much. If I decide to get a DAB radio then
I'll have the aerial already there.

So, my question is: can I put the signals from the three aerials down the
single CT100 cable?

For this would I need two diplexers or something?

Thank you

--
Patrick - Hove, UK
If you wish email me from my web-site: http://www.patrickjames.me.uk

The easiest way to sort that lot out is to have a TV aerial and another for
88-108MHz. The reason for that is the DAB band is harmonically related. So
a 1/4wave on 88-108 is a 1/2wave on DAB and provides acceptable performance.
(If you want stations outside your area a beam will be required.)
Put the TV aerial on the top of the pole, put the VHF dipole further down
the pole mounted about 2ft away. The closer it is to the pole the more
directional it will become, like a heart shape. You can use that to your
advantage.

Use good quality aerials, not the stuff from B&Q like Maxview. The VHF
dipole is held together with self tapping screws that the coax wraps around.
A poor design which allows water in.
Make sure the TV aerial has an F type connector, also get a proper VHF
dipole with screw terminals inside or an F type. Tape the joints and
connectors up well with self amalgamating tape.
Run the coax in to the distribution amp in the loft. Get one with a
separate input for VHF and TV.
Run a coax around to each room and simply use a shielded outlet with
VHF/DAB/TV outlets.

A diplexer or series of them will allow you to combine or extract certain
frequencies. They are just filters, so one only letting TV through would be
a high pass filter blocking anything below say 400MHz. You can also get a
duplexer that allows a number of frequencies to be used in any combination
of transmit and receive on the same aerial at the same time!

Run the coax in to the distribution amp in the loft. Get one with a
separate input for VHF and TV.


Make sure the distribution amp covers the full FM/DAB/UHF bands.

Some have inputs for UHF and FM but dont cover DAB frequencies into
either of
these inputs.

Owain wrote:
Marky P wrote:
... then separate cables from the aerials to a loftbox
distribution amplifier might be more logical.
Because the loftbox or other amplifier will have three separate
inputs.
As the others have said, if you're distributing using a loftbox, have
three separate cables going into the loft and into the 3 inputs on
the loftbox and then distribute the combined signal throughout the
house.

And if you put a spare cable (or 4) in now you can also pipe satellite
^^^^^
through the (right sort of) loftbox

How can you pipe a quad lnb through one output? (That seems to be the
implication)
If such a device exists, I'd be interested in a link.

Owain wrote:
jasee wrote:
And if you put a spare cable (or 4) in now you can also pipe
satellite through the (right sort of) loftbox
How can you pipe a quad lnb through one output? (That seems to be the
implication)
If such a device exists, I'd be interested in a link.

You use a multiswitch with each receiver having a dedicated cable
backl to the multiswitch, but some multiswitches also allow VHF/UHF
integration to the same cable
http://www.brymar.co.uk/acatalog/Dom...tribution.html

Thanks but you need a faceplate with four connections at least if you want
skyplus/ hd sky which doesn't AFAICT seem to be available (don't think it'll
work if both sats are combined)

"jasee" wrote in message
...
Owain wrote:
jasee wrote:
And if you put a spare cable (or 4) in now you can also pipe
satellite through the (right sort of) loftbox
How can you pipe a quad lnb through one output? (That seems to be the
implication)
If such a device exists, I'd be interested in a link.

You use a multiswitch with each receiver having a dedicated cable
backl to the multiswitch, but some multiswitches also allow VHF/UHF
integration to the same cable
http://www.brymar.co.uk/acatalog/Dom...tribution.html

Thanks but you need a faceplate with four connections at least if you want
skyplus/ hd sky which doesn't AFAICT seem to be available (don't think
it'll work if both sats are combined)


ha