Wireless alternative to running aerial cable?

I know Video Senders exist for the purposes of taking a signal from a
set-top box, dvd player etc to send it around the house, but does anyone
know of an equivalent for sending a TV aerial signal? I have a roof-mounted
aerial whose wire terminates in the loft - seemingly snipped off by the
previous occupant. I am not sure I have the necessary know-how to run the
cable down the cavity wall etc, so is there any form of wireless
alternative?

D.

On 04/04/2007 14:13, David Wright wrote:

I have a roof-mounted
aerial whose wire terminates in the loft - seemingly snipped off by the
previous occupant. I am not sure I have the necessary know-how to run the
cable down the cavity wall etc, so is there any form of wireless
alternative?

Just install a self-help relay transmitter in your loft
http://tx.mb21.co.uk/gallery/chalaborough.asp

then install another aerial downstairs to receive from it.
make sure you use vertical polarisation though :-)

On Wed, 4 Apr 2007 14:13:43 +0100, "David Wright"
wrote:

I know Video Senders exist for the purposes of taking a signal from a
set-top box, dvd player etc to send it around the house, but does anyone
know of an equivalent for sending a TV aerial signal? I have a roof-mounted
aerial whose wire terminates in the loft - seemingly snipped off by the
previous occupant. I am not sure I have the necessary know-how to run the
cable down the cavity wall etc, so is there any form of wireless
alternative?

Duh? It's wireless already!

Rod.

On Wed, 04 Apr 2007 21:08:54 +0100, Roderick Stewart
wrote:

On Wed, 4 Apr 2007 14:13:43 +0100, "David Wright"
wrote:

I know Video Senders exist for the purposes of taking a signal from a
set-top box, dvd player etc to send it around the house, but does anyone
know of an equivalent for sending a TV aerial signal? I have a roof-mounted
aerial whose wire terminates in the loft - seemingly snipped off by the
previous occupant. I am not sure I have the necessary know-how to run the
cable down the cavity wall etc, so is there any form of wireless
alternative?

Duh? It's wireless already!

Rod.

You would need to re-broadcast the signal on the same frequencies
which is illegal, but possible. Install a high gain booster amp in
your loft and connect the outrdoor aerial to it's input. Then connect
another aerial to it's output and point the aerial in the desired
direction for reception. Connect a set top aerial to the TV and
you're away! Warning. The signal may be of poor quality.

Marky P.

In message , Marky P
writes
Warning. The signal may be of poor quality.

Marky P.


Warning. You may fall out with your neighbours when they find out that
you are responsible for interfering with their TV reception.

This has been done to good effect but it can also produce problems too.
--
Bill

"David Wright" wrote in message
...
I know Video Senders exist for the purposes of taking a signal from a
set-top box, dvd player etc to send it around the house, but does anyone
know of an equivalent for sending a TV aerial signal? I have a roof-mounted
aerial whose wire terminates in the loft - seemingly snipped off by the
previous occupant. I am not sure I have the necessary know-how to run the
cable down the cavity wall etc, so is there any form of wireless
alternative?

Find a suitably "quiet" corner of the rooms between the cable and the TV,
choose your CT100 aerial cable colour to match the decor and run the cable
down the wall. You will have to drill through the ceilings and floor of the
1st floor to reach the ground floor but the result should be perfectly
reasonable.

Bill Wright and others will also suggest joining the wire using
F-connectors. Don't just twist them together and cover with insulating
tape! Bill and others can comment on the downsides of using a Belling
(normal TV aerial plug/socket) arrangement instead, for those of us who
don't possess the neccessary crimping tools for F-connectors.

Just a thought, have you got a small enough TV to take into the loft? Might
be worth checking you get a good enough picture to warrant the work before
you start. If you need a new aerial anyway, you can get the installer to
put the cable down the outside wall.

And if you need a new aerial, tell the NG where you live and they'll be able
to give some hints. Sadly "experienced" fitters often turn up and just fit
a big "digital" (aka wideband) aerial when a grouped aerial would be corret,
smaller and more effective.

Paul DS.

In message , Marky P
writes
On Wed, 04 Apr 2007 21:08:54 +0100, Roderick Stewart
wrote:

On Wed, 4 Apr 2007 14:13:43 +0100, "David Wright"
wrote:

I know Video Senders exist for the purposes of taking a signal from a
set-top box, dvd player etc to send it around the house, but does anyone
know of an equivalent for sending a TV aerial signal? I have a roof-mounted
aerial whose wire terminates in the loft - seemingly snipped off by the
previous occupant. I am not sure I have the necessary know-how to run the
cable down the cavity wall etc, so is there any form of wireless
alternative?

Duh? It's wireless already!

Rod.

You would need to re-broadcast the signal on the same frequencies
which is illegal, but possible. Install a high gain booster amp in
your loft and connect the outrdoor aerial to it's input. Then connect
another aerial to it's output and point the aerial in the desired
direction for reception. Connect a set top aerial to the TV and
you're away! Warning. The signal may be of poor quality.

Marky P.


Setting up the active relay described above seems a fun idea, but it
should not be undertaken without having a complete understanding of the
technicalities, and should not be done without proper approval. You
certainly won't get this just to avoid cabling your house.!

You need to consider the isolation required between the two aerials. If
the gain of the amplifier exceeds the isolation, you will have made an
oscillator. You really don't want to do that.

In practice, you will have to do a lot better than that. I reckon that,
to re-transmit a reasonably flat signal (+/-1dB), the isolation between
the aerials minus the gain of the amplifier will have to be greater than
20dB (and preferably a lot more).

Be aware that the re-transmitted signal will interfere with the signal
arriving directly at neighbouring TV aerials (and vice versa). As it
will be on exactly the same frequency/ies, it won't cause patterning.
The two signals will add or subtract (depending on the phase
relationship). The re-transmitted signal needs to 'swamp' the direct
signal (ie be at least 20dB stronger). Even if you achieve this in your
property, you are going to upset those neighbours who are watching the
direct signal.

Because of time delays, the re-transmitted signal may also cause a ghost
on the direct signal. Its visibility will depend on how long the delay
is, and the how strong the ghost is.

No, you don't really want to do this!!
Ian.
--

On 4 Apr, 14:13, "David Wright" wrote:
I know Video Senders exist for the purposes of taking a signal from a
set-top box, dvd player etc to send it around the house, but does anyone
know of an equivalent for sending a TV aerial signal? I have a roof-mounted
aerial whose wire terminates in the loft - seemingly snipped off by the
previous occupant. I am not sure I have the necessary know-how to run the
cable down the cavity wall etc, so is there any form of wireless
alternative?

D.

It may be (If this is a "new" house) that the builders left it like
that and the previous occupant didn't do anything about it.

If you are happy to have just the one channel at a time, you could put
a freeview box in the loft together with a wireless transmitter of a
type which will allow the remote control signal to be passed back to
the box, but if people are going to be moving around, some of these
aren't much good.

Don't forget you could always get "Freesat from Sky" instead, all
installed for £150 and all the equipment is yours to keep.
Alternatively, for just a little more, you could sign up to Sky's
basic package and that way tou don'thave to pay in one lump (make sure
you give them plenty of notice of cancellation so you only pay for 12
months). After the 12 months is up, the kit acts just like a Freesat
from Sky rig (and you still own it all). The Freesat channel line up
is slightly different to freeview though.

Paul D.Smith wrote:
snip
Bill Wright and others will also suggest joining the wire using
F-connectors. Don't just twist them together and cover with
insulating tape! Bill and others can comment on the downsides of
using a Belling (normal TV aerial plug/socket) arrangement instead,
for those of us who don't possess the neccessary crimping tools for
F-connectors.
snip
Screw on 'F' connectors work just about as well, you don't need crimping
tools.

....snip...
Screw on 'F' connectors work just about as well, you don't need crimping
tools.

Thanks for that - I didn't know such things existed.

Paul DS