Sutton Coldfield DTT
 

I was in Leamington Spa yesterday visiting relations who have just moved there.

They're in a Victorian terraced house, with three floors and a chimney a scary
height above the ground !

Two aerials, one an 18 element, non contract type, another a 10 element
contract slightly lower down. Both have feeders coming down from roof flapping
in the wind, one has an indoor splitter wrapped up in insulation tape that
feeds two rooms. It all needs ripping out, and starting again. However as a
quick fix to tide them over, I'm planning to replace the 'reachable' parts of
the installation with new cable, and a Proception active 2 way spitter fed
from the contract.
The 18 element will become redundant (in fact it is currently).

Both aerials supply very good analogue pictures for the main four. The
contract aerial additionally supplies a good C5 analogue picture from
Lichfield. Neither can receive anything from Mux D (Ch 55 so just out of band
for a Grp B) and the contract struggles a little with Mux C (Ch 52) and Mux 1
(Ch 41).

Could be lots of reasons, water in the coax, the indoor spitter that's
outdoors might have rotted away, mismatches everywhere.......

One question before I waste any of their money, and my time. Does anyone have
experience of reception of Sutton Coldfield in that area ? I want to make
sure that Muxes C and D are beamed that way with the same whack as the other
four muxes.



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

Sutton Coldfield DTT
 

In article , Mark Carver says...

One question before I waste any of their money, and my time. Does anyone have
experience of reception of Sutton Coldfield in that area ? I want to make
sure that Muxes C and D are beamed that way with the same whack as the other
four muxes.

You'll be wanting this page then which will tell you all you need to
know with a nice coverage map.

http://www.ukfree.tv/txdetail.php?a=SK113003

--
Conor

I only please one person per day. Today is not your day. Tomorrow isn't
looking good either. - Scott Adams

Sutton Coldfield DTT
 

"Mark Carver" wrote in message
...
I was in Leamington Spa yesterday visiting relations who have just moved
there.

They're in a Victorian terraced house, with three floors and a chimney a
scary height above the ground !

Two aerials, one an 18 element, non contract type, another a 10 element
contract slightly lower down. Both have feeders coming down from roof
flapping in the wind, one has an indoor splitter wrapped up in insulation
tape that feeds two rooms. It all needs ripping out, and starting again.
However as a quick fix to tide them over, I'm planning to replace the
'reachable' parts of the installation with new cable, and a Proception
active 2 way spitter fed from the contract.
The 18 element will become redundant (in fact it is currently).

Both aerials supply very good analogue pictures for the main four. The
contract aerial additionally supplies a good C5 analogue picture from
Lichfield. Neither can receive anything from Mux D (Ch 55 so just out of
band for a Grp B) and the contract struggles a little with Mux C (Ch 52)
and Mux 1 (Ch 41).

Could be lots of reasons, water in the coax, the indoor spitter that's
outdoors might have rotted away, mismatches everywhere.......

One question before I waste any of their money, and my time. Does anyone
have experience of reception of Sutton Coldfield in that area ? I want to
make sure that Muxes C and D are beamed that way with the same whack as
the other four muxes.

Morning Mark,

Sorry I don't know anyone in that area, however using a generic central
Leamington Spa postcode gives this variable result :
http://www.digitaluk.co.uk/postcodec...038c1fd7591742

As an aside, I'm now using group B's on SC with little if any noticeable
loss in performance on 55. I suspect new ones have slightly better gain at
the ends of group B, also I don't use contract aerials.

Sutton Coldfield DTT
 

"Mark Carver" wrote in message
...
I was in Leamington Spa yesterday visiting relations who have just
moved there.

They're in a Victorian terraced house, with three floors and a chimney
a scary height above the ground !

Two aerials, one an 18 element, non contract type, another a 10
element contract slightly lower down. Both have feeders coming down
from roof flapping in the wind, one has an indoor splitter wrapped up
in insulation tape that feeds two rooms. It all needs ripping out, and
starting again. However as a quick fix to tide them over, I'm planning
to replace the 'reachable' parts of the installation with new cable,
and a Proception active 2 way spitter fed from the contract.
The 18 element will become redundant (in fact it is currently).

Both aerials supply very good analogue pictures for the main four. The
contract aerial additionally supplies a good C5 analogue picture from
Lichfield. Neither can receive anything from Mux D (Ch 55 so just out
of band for a Grp B) and the contract struggles a little with Mux C
(Ch 52) and Mux 1 (Ch 41).

Could be lots of reasons, water in the coax, the indoor spitter that's
outdoors might have rotted away, mismatches everywhere.......

One question before I waste any of their money, and my time. Does
anyone have experience of reception of Sutton Coldfield in that area ?
I want to make sure that Muxes C and D are beamed that way with the
same whack as the other four muxes.



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



I do wish people would get away from this idea that a station on a
channel that is nominally out of band for any given aerial will not be
received. The aerial does not receive 38-54 and not 37 and 55 - it will
get them all, just the gain will start to drop off quite quickly out of
band and it may also cause ghosting (which DTTV does NOT like.)


--
Woody

harrogate three at ntlworld dot com

Sutton Coldfield DTT
 

"Woody" wrote in message
...
"Mark Carver" wrote in message
...
One question before I waste any of their money, and my time. Does anyone
have experience of reception of Sutton Coldfield in that area ? I want to
make sure that Muxes C and D are beamed that way with the same whack as
the other four muxes.

I do wish people would get away from this idea that a station on a channel
that is nominally out of band for any given aerial will not be received.
The aerial does not receive 38-54 and not 37 and 55 - it will get them
all, just the gain will start to drop off quite quickly out of band

Very quickly above the design range. I've been surprised at how the ch55 mux
suffers with a Gp aerial. In extremis (got a B but no E) grind 5mm off the
ends of the six or eight shortest directors.

and it may also cause ghosting (which DTTV does NOT like.)
It doesn't not like it as much as analogue does not like it.

Bill

Sutton Coldfield DTT
 

Woody wrote:



|| just the gain will start to drop off quite quickly out of band and it may
also cause ghosting (which DTTV does NOT like.)
||
||


I live in an area of low signal strength [Mendip] which also sufferers from
very bad multi-path reception, in fact today the ghosting and signal level
is fluctuating really badly on analogue because of the effect of high winds
on surrounding trees, none of which is having the slightest effect on my
digital reception, this despite the muxes being at the very top end of the
band which sufferers most on analogue here.

In fact digital reception has always been so rock solid that I have long
since given up using analogue altogether, I was also under the impression
that in some instances DVB reception can actually be enhanced by multi-path
reception.

Sutton Coldfield DTT
 

Conor wrote:
In article , Mark Carver says...

One question before I waste any of their money, and my time. Does anyone have
experience of reception of Sutton Coldfield in that area ? I want to make
sure that Muxes C and D are beamed that way with the same whack as the other
four muxes.

You'll be wanting this page then which will tell you all you need to
know with a nice coverage map.

http://www.ukfree.tv/txdetail.php?a=SK113003

Thanks, but the maps on that site are unreliable. They don't take into account
directional nulls, that are often present on one or more muxes from some
transmitters.

The map for my local Tx, Hannington, is total nonsense for instance, as no DTT
radiation is actually directed eastwards. However, UK Free have simply taken
the analogue coverage map, and assumed that DTT is the same.


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

Sutton Coldfield DTT
 

Bill Wright wrote:
"Woody" wrote in message

I do wish people would get away from this idea that a station on a channel
that is nominally out of band for any given aerial will not be received.
The aerial does not receive 38-54 and not 37 and 55 - it will get them
all, just the gain will start to drop off quite quickly out of band

Very quickly above the design range. I've been surprised at how the ch55 mux
suffers with a Gp aerial. In extremis (got a B but no E) grind 5mm off the
ends of the six or eight shortest directors.

While I'm not silly enough to expect predicable performance out of band, is
the roll off on lower gain aerials generally not as steep as with high gain ?
Theory suggests a yagi is always a compromise between gain and bandwidth,
what's your practical experience Bill ?

I did note Ch 37 performance was much better on the lower gain cheapy contract
aerial, than the better looking 18 element. I'm assuming both are 'old style'
Group Bs (39-53), but there could still be a pile of variables at play.


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

Sutton Coldfield DTT
 

Very quickly above the design range. I've been surprised at how the ch55
mux
suffers with a Gp aerial. In extremis (got a B but no E) grind 5mm off the
ends of the six or eight shortest directors.


Interesting. The Anti TCX18 B/K I used recently seemed to have better gain
on the 55 MUX than a couple of the lower ones. My own XG10E/W is almost
directly behind this installation (by about 100 metres) and all the MUX's
are at a very similar level.

Sutton Coldfield DTT
 

Doctor D wrote:

Sorry I don't know anyone in that area, however using a generic central
Leamington Spa postcode gives this variable result :
http://www.digitaluk.co.uk/postcodec...038c1fd7591742

Good thinking, I'd forgotten about that. Looks better than that chucking their
postcode in:-

http://www.markyboy.net/lemspa.jpg

As an aside, I'm now using group B's on SC with little if any noticeable
loss in performance on 55. I suspect new ones have slightly better gain
at the ends of group B, also I don't use contract aerials.

Something I seem to recall from several years in here, is that many Sutton
Coldfield folk get away with Group Bs for the Ch 55 mux ?


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