New aerial installation

I would like to replace my existing aerial and cabling which has been
in use for many years.

From my location in Liverpool I have the option of using the following
transmitters:-

Moel-y-Parc (21 miles distance)

Storeton (7 miles distance)

Winter Hill (24 miles distance)


In the past the reception from Winter Hill was not very good due to
ghosting and a dark vertical band appearing on the TV screen,
according to a number of aerial riggers this problem arose from the
large 'water tower' sited at the local Ford factory (now Jaguar -
Halewood).

We then had an aerial aligned on the Moel-y-Parc transmitter for a few
years later switching to the Storeton transmitter which gave us
perfect reception and local news!

With the digital switch over are we likely to get a better signal
compared with the analogue reception we received from Winter Hill,
still wonder what the effect of the 'water tower' would be on a
digital signal.

I tend to think that I might be better staying with the Storeton
transmitter, I have checked some web sites to see what aerial is
recommended for Storeton after the digital switch over and the
recommendation is for a wideband aerial.

As I live adjacent to a main road which carries considerable traffic
into Liverpool I was thinking of getting a 'Log Periodic' aerial as
they appear to be less affected by passing traffic (dodgy ignition
systems). At the moment with my present aerial set-up the digital TV
picture can freeze when some of the local kids go past on their
scrambler type motorbikes!

If you dont think the 'Log Periodic' is suitable can you recommend a
'quality' wideband aerial?

Agzee

On Thu, 17 Sep 2009 11:43:44 +0000, Agzee wrote:

I tend to think that I might be better staying with the Storeton
transmitter

The advantage of staying with Storeton is that following DSO you will
be able to continue to receive the current services at a better level
of signal plus the Cymraeg versions of PSB-1, PSB-2, and PSB-3 which
will start transmitting from this site in late 2009.

"J G Miller" wrote in message
news
On Thu, 17 Sep 2009 11:43:44 +0000, Agzee wrote:

I tend to think that I might be better staying with the Storeton
transmitter

The advantage of staying with Storeton is that following DSO you will
be able to continue to receive the current services at a better level
of signal plus the Cymraeg versions of PSB-1, PSB-2, and PSB-3 which
will start transmitting from this site in late 2009.

It's unlikely that the Welsh channels will make to Liverpool. I would have
thought they'd be highly directional.

Bill

"Agzee" wrote in message
...
As I live adjacent to a main road which carries considerable traffic
into Liverpool I was thinking of getting a 'Log Periodic' aerial as
they appear to be less affected by passing traffic (dodgy ignition
systems). At the moment with my present aerial set-up the digital TV
picture can freeze when some of the local kids go past on their
scrambler type motorbikes!

If you dont think the 'Log Periodic' is suitable can you recommend a
'quality' wideband aerial?

Use the tx that gives the best field strength.I'd be surprised if impulse
noise was a problem after DSO.

Bill

Bill Wright wrote:
"J G Miller" wrote in message
news
On Thu, 17 Sep 2009 11:43:44 +0000, Agzee wrote:

I tend to think that I might be better staying with the Storeton
transmitter
The advantage of staying with Storeton is that following DSO you will
be able to continue to receive the current services at a better level
of signal plus the Cymraeg versions of PSB-1, PSB-2, and PSB-3 which
will start transmitting from this site in late 2009.

It's unlikely that the Welsh channels will make to Liverpool. I would have
thought they'd be highly directional.

Yes, it will be. In any case why would anybody want the Welsh versions of the
PSBs, few people in Wales, fortunate enough to have a reception choice, opt
for them !


--
Mark
Please replace invalid and invalid with gmx and net to reply.

www.paras.org.uk

On Thu, 17 Sep 2009 14:26:21 +0100, Bill Wright wrote:

It's unlikely that the Welsh channels will make to Liverpool. I would
have thought they'd be highly directional.

I am sure the transmissions will be highly directional but will they be
so well tuned that no signal at all is radiated to the rear?

Of course if Storeton Cymru transmissions are too weak, then Moel-y-Parc
which is in roughly the same direction for many people in the low lying
areas of Liverpool needing Storeton (Aigburth, Cressington etc) will more
than likely provide adequate signal strength on the PSB multiplexes at least.

Recall that Moel-y-Parc analog currently reaches Lancaster to the north
and Market Drayton to the south.

In article ,
J G Miller wrote:
On Thu, 17 Sep 2009 14:26:21 +0100, Bill Wright wrote:

It's unlikely that the Welsh channels will make to Liverpool. I would
have thought they'd be highly directional.

I am sure the transmissions will be highly directional but will they be
so well tuned that no signal at all is radiated to the rear?

at least 20dB down

Of course if Storeton Cymru transmissions are too weak, then Moel-y-Parc
which is in roughly the same direction for many people in the low lying
areas of Liverpool needing Storeton (Aigburth, Cressington etc) will more
than likely provide adequate signal strength on the PSB multiplexes at
least.

but if you are using Storeton, you should have a vertically polarized
aerial. MyP is HP. Again that should be 20dB down.

--
From KT24

Using a RISC OS computer running v5.11

On Thu, 17 Sep 2009 20:25:17 +0100, charles wrote:
but if you are using Storeton, you should have a vertically polarized
aerial. MyP is HP. Again that should be 20dB down.

Yes, no disagreement with that.

I would suggest however that once the power on Storeton is
turned up, many people within 2-3 miles distance of the transmitter
will get a more than adequate signal even if their antenna is
horizontally polarized and off beam pointing at Moel-y-Parc rather
than directly at Storeton.

I have heard of numerous complaints of people in Wirral who have their
antennas pointed at Winter Hill and when they do a rescan, they get
BBC-1 Wales on 1 rather than BBC-1 North West on LCN 1 because even
though their antenna is pointed in the wrong direction there is
still sufficient signal from Moel-y-Parc for the digital converter
box to find it first on the lower UHF channel during the band scan
(or tune as some prefer to call it).

"J G Miller" wrote in message
news
On Thu, 17 Sep 2009 20:25:17 +0100, charles wrote:
but if you are using Storeton, you should have a vertically polarized
I would suggest however that once the power on Storeton is
turned up, many people within 2-3 miles distance of the transmitter
will get a more than adequate signal even if their antenna is
horizontally polarized and off beam pointing at Moel-y-Parc rather
than directly at Storeton.

You'd be surprised how directional these transmitters can be. We aren't
talking about a few crossed logs here! In Sheffield at a distance of 1km
from Crosspool (but to the south) the DTT is far too weak to be used.

Bill

On Thu, 17 Sep 2009 21:30:45 +0100, Bill Wright wrote:

You'd be surprised how directional these transmitters can be.

I am not trying to claim that the transmissions cannot be very directional.

A check of

http://tx.mb21.co.uk/gallery/storeton.php

shows that a reflector has been installed at the back of the Storeton Cymru
transmitting antennas to minimize signal eastwards.

The question is with regard to them, how far away does one have to be
from the mast in the opposite direction to where they are pointing,
for the signal to become useless?