Whatever happened to 4G interference?
 

In message , Bill Wright
writes
On 06/11/2015 14:11, Bill Wright wrote:
On 06/11/2015 10:05, Mark Carver wrote:


http://www.deadlinenews.co.uk/2015/1...s-4g-but-loses





Blimey, and they've had TV there since 1929, 7 years before it came to
London ?


Evidently they've had COM6 on ch60 since 1929.

Bill

To expand on what I now realise is a slightly enigmatic quip, a lot of
people in Coldstream use Selkirk tx, which broadcasts on ch60 and other
high channels. Ch60 is very close to the 4G band. The signal from
Selkirk is not good so there are a lot of masthead amps in use. It's a
recipe for 4G disaster!

The other possible tx is Chatton, and again signal levels are mediocre
to poor, but at least the closest channel to the 4G stuff is ch47.

But, of course, Selkirk carries the Scottish TV, while Chatton carries
the English.

Until Chatton opened (around 1970), the only good source of ITV/BBC TV
will have been Selkirk/Ashkirk. As Coldstream is all (just) in Scotland,
despite being 'borderers' the natural affinity of most of the folk there
will towards Scotland. Also, I would have thought that Coldstream should
be getting a pretty good signal from Selkirk.
https://ukfree.tv/transmitters/tv/Selkirk.
Mind you, Chatton should also be OK there (although the Cheviots will
chop it off slightly further west).
https://ukfree.tv/transmitters/tv/Chatton
Even if there are spots where Chatton provides a somewhat better signal
than Selkirk, I wouldn't be surprised if most people will go out of
their way to get the Selkirk transmitter.

I wonder where the 4G mast is?

Bill

--
Ian

Whatever happened to 4G interference?
 

On 06/11/2015 19:48, Ian Jackson wrote:

Until Chatton opened (around 1970), the only good source of ITV/BBC TV
will have been Selkirk/Ashkirk.

Chatton opened (for BBC1, 2 and Tyne Tees in 1974 (Aug 74 for TTTV,
don't know the month for BBC)

Selkirk opened March 72 for Border ITV, and in 1973 (Month unknown) for
BBC 1/2,

(All for UHF of course, Selkirk was an ITV VHF site, and Ashkirk the BBC
VHF site, Chatton was a virgin UHF site.

So Selkirk didn't really predate Chatton by too much (especially for BBC
channels)

I've got a set of large scale 1970s IBA survey maps, Coldstream is shown
inside (just ) the primary coverage area of Selkirk, and
the very fringe of Chatton's, though as with UHF propagation, take that
as a very rough indication !


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

Whatever happened to 4G interference?
 

In message , Mark Carver
writes
On 06/11/2015 19:48, Ian Jackson wrote:

Until Chatton opened (around 1970), the only good source of ITV/BBC TV
will have been Selkirk/Ashkirk.

Chatton opened (for BBC1, 2 and Tyne Tees in 1974 (Aug 74 for TTTV,
don't know the month for BBC)

Selkirk opened March 72 for Border ITV, and in 1973 (Month unknown) for
BBC 1/2,

(All for UHF of course, Selkirk was an ITV VHF site, and Ashkirk the
BBC VHF site, Chatton was a virgin UHF site.

So Selkirk didn't really predate Chatton by too much (especially for
BBC channels)

Yebbut,,,it did - on VHF. BBC Ashkirk was Ch1, and ITV Selkirk Ch13
(both vertical). With a crudely made 2-element aerial, I could just get
a locked (but totally unwatchable) Ch1 picture on an ancient Bush (?)
14" TV set - but no sign of Ch13 (far too much of The Cheviot in the
way).

I've got a set of large scale 1970s IBA survey maps, Coldstream is
shown inside (just ) the primary coverage area of Selkirk, and
the very fringe of Chatton's, though as with UHF propagation, take that
as a very rough indication !

Chatton was a godsend when it arrived. Until then, until you got near
the border area a large part of north Northumberland had to make do with
a very poor TV service from Pontop Pike / Burnhope (Chs 5 and 8). We
went from the ridiculous to the sublime - from large yagis on massive
poles to (literally) a dipole made from a bent coathanger on the
ground-floor windowsill.



--
Ian

Whatever happened to 4G interference?
 

On 06/11/2015 16:47, Woody wrote:

A little bit of digging tends to suggest that the only 4G available in
the town - and it is weak at that - is EE which is on 1800MHz AFAIK,
so who is kidding who?

I bet that info is out of date and one of the 800MHz networks has set
up. I know that when we've had a 4G problem and we've looked at the
various sources of information they generally haven't shown the very
recent additions, and I think one site (can't remember which) has a
disclaimer to that effect.

Bill

Whatever happened to 4G interference?
 

On 06/11/2015 19:48, Ian Jackson wrote:


Also, I would have thought that Coldstream should
be getting a pretty good signal from Selkirk.
https://ukfree.tv/transmitters/tv/Selkirk.

Well it doesn't. Rely on what them that's spent a fair bit of time there
like me are telling you, not on a theoretical prediction.

Bill

Whatever happened to 4G interference?
 

On 06/11/2015 23:07, Bill Wright wrote:
On 06/11/2015 19:48, Ian Jackson wrote:


Also, I would have thought that Coldstream should
be getting a pretty good signal from Selkirk.
https://ukfree.tv/transmitters/tv/Selkirk.

Well it doesn't. Rely on what them that's spent a fair bit of time there
like me are telling you, not on a theoretical prediction.

Bill

OK so I did start to wonder why field strength from Selkirk is so crap
in the middle of Coldstream, when it's OK in some surrounding areas. It
turns out to be the fault of Alec Douglas-Home, or at least his family.
At the south end of their estate there is a 50m hill (near the golf
course) which is only 1.5km from the town centre. The hill screens a lot
of the town from Selkirk. This doesn't show up too well on a profile but
add the large trees on the hill and it all makes sense.

Bill

Whatever happened to 4G interference?
 

In article , Bill Wright
wrote:
On 06/11/2015 16:47, Woody wrote:

A little bit of digging tends to suggest that the only 4G available in
the town - and it is weak at that - is EE which is on 1800MHz AFAIK,
so who is kidding who?

I bet that info is out of date and one of the 800MHz networks has set
up. I know that when we've had a 4G problem and we've looked at the
various sources of information they generally haven't shown the very
recent additions, and I think one site (can't remember which) has a
disclaimer to that effect.

It's ages since I looked at this, but my (unreliable) recollection is that
EE do have an allocation in the bands just above ch60.

Jim

--
Please use the address on the audiomisc page if you wish to email me.
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html

Whatever happened to 4G interference?
 

In message , Bill Wright
writes
On 06/11/2015 23:07, Bill Wright wrote:
On 06/11/2015 19:48, Ian Jackson wrote:


Also, I would have thought that Coldstream should
be getting a pretty good signal from Selkirk.
https://ukfree.tv/transmitters/tv/Selkirk.

Well it doesn't. Rely on what them that's spent a fair bit of time there
like me are telling you, not on a theoretical prediction.

Bill

OK so I did start to wonder why field strength from Selkirk is so crap
in the middle of Coldstream, when it's OK in some surrounding areas. It
turns out to be the fault of Alec Douglas-Home, or at least his family.
At the south end of their estate there is a 50m hill (near the golf
course) which is only 1.5km from the town centre. The hill screens a
lot of the town from Selkirk. This doesn't show up too well on a
profile but add the large trees on the hill and it all makes sense.

A quick look on Street View indeed shows that almost all of the TV
aerials are for Selkirk.

As they are typically at least 10 element, I guess that the signal is
only fairly middling.

In the housing estate to the north side of town (higher ground with a
better view to the south), there are also quite a few second aerials for
Chatton. As these are even larger, the signal is still probably a bit
marginal.
--
Ian

Whatever happened to 4G interference?
 

Jim Lesurf wrote:

It's ages since I looked at this, but my (unreliable) recollection is that
EE do have an allocation in the bands just above ch60.

My scrappy little .txt file has this, had to break the lines into two

|791-796|796-801|801--------811|811--------821|
|H3G====|EE=====|VODAFONE======|O2============|


|821--------832|832-837|837-842|842--------852|852--------862|
|DUPLEX GAP====|H3G====|EE-----|VODAFONE======|O2============|

Whatever happened to 4G interference?
 

On 07/11/2015 14:30, Andy Burns wrote:
Jim Lesurf wrote:

It's ages since I looked at this, but my (unreliable) recollection is
that
EE do have an allocation in the bands just above ch60.

My scrappy little .txt file has this, had to break the lines into two

|791-796|796-801|801--------811|811--------821|
|H3G====|EE=====|VODAFONE======|O2============|


|821--------832|832-837|837-842|842--------852|852--------862|
|DUPLEX GAP====|H3G====|EE-----|VODAFONE======|O2============|


AIUI Vodafone and O2 are jointly rolling out 4G as part of a project
called 'Cornerstone'. Site sharing and where possible sharing aerials.
Think of it as the equivalent of the BBC and IBA UHF TV roll out of the
70s/80s/90s. So likely if a Vodafone 4G service pops up, O2 will not be
far behind (as vice versa)

EE and Three also have a similar (but not as extensive) site sharing
agreement with each other called MBNL.

(Interesting times ahead considering Three's parent company buying O2,
and BT given the green light to take over EE)

We might end up with one giant unified coverage national mobile phone
network, with individual service providers just buying 'bandwidth' on it.


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