After an evening (21/12/2011) with poor ITV and very dodgy BBC reception a
check on the internet revealed no faults with Rowridge, although signal
strength was down 50%.
Another interesting item was that in March when the changeover occurs the
strongest signal will need a vertical polarised aerial, it is horizontal
now.
Has this been the case with other areas?

On Dec 23, 9:33*am, "Martin C" martin.carpenternospam
wrote:
After an evening (21/12/2011) with poor ITV and very dodgy BBC reception a
check on the internet revealed no faults with Rowridge, although signal
strength was down 50%.
Another interesting item was that in March when the changeover occurs the
strongest signal will need *a vertical polarised aerial, it is horizontal
now.
Has this been the case with other areas?

I think Rowridge is unique in this respect, the dual VP/HP thing is to
prevent interference with the Frenchies. Last time I checked the muxes
with high power VP component would still be at current power levels on
HP - I do hope so as I really don't want to have to turn my antenna
through 90 degrees. Lots of new antennas going up round here -
Christchurch area - despite Rowridge staying in group. They're not all
cross polar antennas either, and usually far bigger than necessary.

Martin C wrote:
After an evening (21/12/2011) with poor ITV and very dodgy BBC reception a
check on the internet revealed no faults with Rowridge, although signal
strength was down 50%.
Another interesting item was that in March when the changeover occurs the
strongest signal will need a vertical polarised aerial, it is horizontal
now.
Has this been the case with other areas?

Rowridge will have a vertical component added in March, in addition to the
existing horizontal component.

The three PSB muxes will run at 200kW H Pol *and* 200kW V Pol from March

From April 18th (same day as London DSO 2) the three COMs will run at 50kW H
Pol, and 200kW V Pol, so yes, the COMs will be at higher power in the vertical
plane, than the horizontal. However the main PSB channels will have a equal
power split.

The idea is thought to be able to discriminate against possible H Pol
interference from across the English Channel. Of course to take advantage of
this, after April, existing receiving aerials will need to be moved to VP.

Rowridge is the only main high power transmitter to have this feature. There
are a few small relays that are having, or have had, an HP component added at DSO.

Also in the Meridian area, where Rowridge runs out of steam, the Findon relay
is increasing power at DSO to 2kW, in order to serve (as an alternative to
Rowridge) Worthing and Littlehampton. However it will only carry the three PSB
muxes. (UHF Ch 41,44,47 Vert Pol)

There's also going to be a brand new highish power relay for Bexhill, Horz P
UHF 43, 46, 48



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

www.paras.org.uk

On Dec 23, 9:54*am, airsmoothed wrote:
On Dec 23, 9:33*am, "Martin C" martin.carpenternospam

wrote:
After an evening (21/12/2011) with poor ITV and very dodgy BBC reception a
check on the internet revealed no faults with Rowridge, although signal
strength was down 50%.
Another interesting item was that in March when the changeover occurs the
strongest signal will need *a vertical polarised aerial, it is horizontal
now.
Has this been the case with other areas?

Lots of new antennas going up round here -
Christchurch area - despite Rowridge staying in group. They're not all
cross polar antennas either, and usually far bigger than necessary.

This is pretty typical of what the pros are putting up round my way:-

http://tinypic.com/r/sct9j7/5

Well at least its HP/VP friendly.

That's been up about 18 months, already developed a fair old lean.
FWIW my house is a few yards away, I get glitch free reception on all
sports of Freeview boxes from an 18 element HP Screwfix wideband with
a low gain MHA and half a mile of old brown co-ax.

airsmoothed wrote:

Christchurch area - despite Rowridge staying in group. They're not all
cross polar antennas either, and usually far bigger than necessary.

This is pretty typical of what the pros are putting up round my way:-

http://tinypic.com/r/sct9j7/5

Well at least its HP/VP friendly.

That's only going to respond to signals in a single plane though, HP the way
it's currently orientated.

True cross polar yagis would look that the four ones seen here at Saddleworth
(that transmit the Manchester ILR station Key 103)

http://tx.mb21.co.uk/gallery/saddleworth-lg-03.jpg

I agree though, for Christchurch they are rather OTT !

By the way, here's the new mast and post DSO aerials at Rowridge:-

http://tx.mb21.co.uk/gallery/gallery...560&pageid=896

Interesting article here too:-

http://www.theonlineengineer.org/v20...geengland.html


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

www.paras.org.uk

airsmoothed wrote:

This is pretty typical of what the pros are putting up round my way:-

http://tinypic.com/r/sct9j7/5

That's terrible! Really bad.

Bill

On 23/12/2011 09:58, Mark Carver wrote:
Martin C wrote:
After an evening (21/12/2011) with poor ITV and very dodgy BBC
reception a check on the internet revealed no faults with Rowridge,
although signal strength was down 50%.
Another interesting item was that in March when the changeover occurs
the strongest signal will need a vertical polarised aerial, it is
horizontal now.
Has this been the case with other areas?

Rowridge will have a vertical component added in March, in addition to
the existing horizontal component.

The three PSB muxes will run at 200kW H Pol *and* 200kW V Pol from March

From April 18th (same day as London DSO 2) the three COMs will run at
50kW H Pol, and 200kW V Pol, so yes, the COMs will be at higher power in
the vertical plane, than the horizontal. However the main PSB channels
will have a equal power split.

The idea is thought to be able to discriminate against possible H Pol
interference from across the English Channel. Of course to take
advantage of this, after April, existing receiving aerials will need to
be moved to VP.

Rowridge is the only main high power transmitter to have this feature.
There are a few small relays that are having, or have had, an HP
component added at DSO.

Also in the Meridian area, where Rowridge runs out of steam, the Findon
relay is increasing power at DSO to 2kW, in order to serve (as an
alternative to Rowridge) Worthing and Littlehampton. However it will
only carry the three PSB muxes. (UHF Ch 41,44,47 Vert Pol)

There's also going to be a brand new highish power relay for Bexhill,
Horz P UHF 43, 46, 48



From what I can see from http://www.ukfree.tv/txdetail.php?a=SZ447865
the pre-DSO muxes are all running at 20kW - so presumably anyone who
gets accepable reception now will continue to do so after DSO from the
50kW horizontal transmissions without needing to change the orientation
of their aerials?

I do hope so, because I live part-time in a flat in Lyndhurst which has
an aerial - installed by the previous owner - somewhere in an
inaccessible bit of roof-space - so I'm hoping that will continue to
work ok. Freeview reception is fine at the moment from all muxes.
--
Cheers,
Roger
____________
Please reply to Newsgroup. Whilst email address is valid, it is seldom
checked.

Roger Mills wrote:

From what I can see from http://www.ukfree.tv/txdetail.php?a=SZ447865
the pre-DSO muxes are all running at 20kW - so presumably anyone who
gets accepable reception now will continue to do so after DSO from the
50kW horizontal transmissions without needing to change the orientation
of their aerials?

I do hope so, because I live part-time in a flat in Lyndhurst which has
an aerial - installed by the previous owner - somewhere in an
inaccessible bit of roof-space - so I'm hoping that will continue to
work ok. Freeview reception is fine at the moment from all muxes.

Should be OK after DSO. Also, all the muxes move to UHF Chs 21 to 28.

Currently Mux C and D are at 33 and 37, Ch 37 is outside the range of older
Group A aerials, and on the very edge for newer ones.

The three main PSB muxes will move to Ch 21, 24, and 27, where analogue C4,
BBC 2, and ITV are currently, so if reception of those is clean now, should be
fine after March.


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

www.paras.org.uk

In message , Bill Wright
writes
airsmoothed wrote:

This is pretty typical of what the pros are putting up round my way:-
http://tinypic.com/r/sct9j7/5

That's terrible! Really bad.

But extremely well taped.
--
Ian

Ian Jackson wrote:
In message , Bill Wright
writes
airsmoothed wrote:

This is pretty typical of what the pros are putting up round my way:-
http://tinypic.com/r/sct9j7/5

That's terrible! Really bad.

But extremely well taped.

There's a rigger in the Leamington Spa area that similarly loves tape, perhaps
he moonlights in Christchurch !

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

www.paras.org.uk