[cma-l] Funky SX and the Lille tranmitter

Thu Jul 30 11:22:55 BST 2015

Dear All

Don't know much about these things chaps, but would not a DIRECTIONAL
ANTENNA set back pointing in the direction of France push them back somewhat
?  or am I on fantasy island ?               over to Ian/Alex and Glyn on
that one. You could fire it straight up the channel tunnel    LOL

We have two Stations interfering with us slightly .....Chorley Cake FM (SAME
FREQUENCY 102.8   but hey, we're all in it together and I know we interfere
with them as well, so it's give and take on that one (we don't interfere
with each other in the core areas though)                 however    Real in
Wales coming out of Welshpool 102.8fm are all over us like a bad rash in
Kerridge . we know the reason why though. Our transmitter sits just behind
the Hill and high up on what we call 'ligetts'   and they would be
'line-of-sight' so they tickle away at us . on a bad day, they do come over
the top.

Listening to Gene Pitney mixed in with Jennifer Lopez doesn't quite work,
somehow I don't think it is going to catch on ??     funny though !   :-)

Pound 4 pound regardless of all my whingings on this matter . we don't do to
badly I suppose. I would imagine it is a nightmare though down in Essex and
Kent / London .. 

By the way, who does the planning and mapping of all that Jazz down south ?
Brains from Thunderbirds !    it must be a nightmare.

Regards

Nick

  _____  

From: cma-l-bounces at mailman.commedia.org.uk
[mailto:cma-l-bounces at mailman.commedia.org.uk] On Behalf Of Two Lochs Radio
Sent: 30 July 2015 10:59
To: The Community Media Association Discussion List
Subject: Re: [cma-l] Funky SX and the Lille tranmitter

Just out of interest, we have a 2kW relay on 106.6FM and in the past its
signal has been swamped in places by the signal from Radio Estel in
Barcelona, strongly enough that an RDS receiver on the fringe of our
station's coverage where it doesn't normally show a reliable RDS display was
happily showing the R Estel id (which is how we identified the station).
This was of course during a period of high pressue sporadic propagation, but
it lasted on and off for several hours, but was from a transmitter of just
20kW a cool 1,900km away!

We also get fringe adjacent channel interference from Classic FM on 101.9FM
in Northern Ireland. Not sporadic propagation this time, but fairly regular
positional reception - the Classic FM transmitter is a more modest 345km
away, but with around 200kW erp in our direction from a site 366m ASL! 

Alex

PS I wonder which power Ofcom was using to calculate likely interference
from the Lille transmitter - despite what MDS975 says, four of the services
are actually listed  as 126kW max, and 32-40kW in the direction of Essex
though that's only 5-6dB less. The horizontal polarization should
effectively lose several more dB. Tellingly, the same frequencies are
re-used in France at much closer range than Essex!  France Info on 105.2MHz
is at about double those powers, but again restricted in the direction of
the UK. Oresumably Ofcom has definitive versions of all this info.

----- Original Message ----- 

From: Associated Broadcast <mailto:info at a-bc.co.uk>  Consultants 

To: The Community Media Association <mailto:cma-l at mailman.commedia.org.uk>
Discussion List 

Sent: Thursday, July 30, 2015 9:54 AM

Subject: [cma-l] Funky SX and the Lille tranmitter

Ian said: 

We saw how a CR station in Southend on the cleared "vacant" frequency would
not interfere with any existing broadcaster, but could seriously suffer from
incoming interference in sporadic tropospheric propagation conditions from a
4kW station in northern France

In fact it is ....400kW - yikes!  Info here:
http://www.mds975.co.uk/masts/bouvigny.html  It is horizontally polarised
which may help mitigate it a bit.

Glyn

-- 

Glyn Roylance - Principal Consultant 

Associated Broadcast <http://www.a-bc.co.uk/>  Consultants

 <http://www.a-bc.co.uk/index.html>  

  _____  

_______________________________________________

Reply - cma-l at commedia.org.uk

The cma-l mailing list is a members' service provided by the Community Media
Association - http://www.commedia.org.uk
Twitter: http://twitter.com/community_media
http://www.facebook.com/CommunityMediaAssociation
Canstream Internet Radio & Video: http://www.canstream.co.uk/
_______________________________________________

Mailing list guidelines:
http://www.commedia.org.uk/about/cma-email-lists/email-list-guidelines/
_______________________________________________

To unsubscribe or manage your CMA-L mailing list subscription please visit:
http://mailman.commedia.org.uk/mailman/listinfo/cma-l

---
This email is free from viruses and malware because avast! Antivirus protection is active.
https://www.avast.com/antivirus
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.commedia.org.uk/pipermail/cma-l/attachments/20150730/ae991600/attachment.html>