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<DIV><FONT size=2 face=Calibri>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!</FONT></DIV>
<DIV><FONT size=2 face=Calibri></FONT> </DIV>
<DIV><FONT size=2 face=Calibri>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! </FONT></DIV>
<DIV><FONT size=2 face=Calibri></FONT> </DIV>
<DIV><FONT size=2 face=Calibri>Alex</FONT></DIV>
<DIV><FONT size=2 face=Calibri></FONT> </DIV>
<DIV><FONT size=2 face=Calibri>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.</FONT></DIV>
<DIV><FONT size=2 face=Calibri></FONT> </DIV>
<DIV><FONT size=2 face=Calibri></FONT> </DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=info@a-bc.co.uk href="mailto:info@a-bc.co.uk">Associated Broadcast
Consultants</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=cma-l@mailman.commedia.org.uk
href="mailto:cma-l@mailman.commedia.org.uk">The Community Media Association
Discussion List</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, July 30, 2015 9:54
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [cma-l] Funky SX and the Lille
tranmitter</DIV>
<DIV><BR></DIV>
<DIV dir=ltr>
<DIV><BR></DIV>
<DIV><BR></DIV>Ian said:
<DIV><BR></DIV>
<BLOCKQUOTE
style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0px; MARGIN: 0px 0px 0px 40px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0px"><SPAN
style="FONT-SIZE: 12px"><I>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</I></SPAN></BLOCKQUOTE>
<DIV><SPAN style="FONT-SIZE: 12px"><BR></SPAN></DIV>
<DIV><SPAN style="FONT-SIZE: 12px">In fact it is ....<U>400kW</U> -
yikes! Info here: <A
href="http://www.mds975.co.uk/masts/bouvigny.html">http://www.mds975.co.uk/masts/bouvigny.html</A>
It is horizontally polarised which may help mitigate it a
bit.</SPAN></DIV>
<DIV><SPAN style="FONT-SIZE: 12px"><BR></SPAN></DIV>
<DIV><BR></DIV>
<DIV><SPAN style="FONT-SIZE: 12px">Glyn</SPAN></DIV>
<DIV><SPAN style="FONT-SIZE: 12px"><BR></SPAN></DIV>
<DIV class=gmail_extra>-- <BR>
<DIV class=gmail_signature>Glyn Roylance - Principal Consultant
<DIV>
<DIV><A href="http://www.a-bc.co.uk/" target=_blank>Associated Broadcast
Consultants</A></DIV></DIV>
<DIV><A href="http://www.a-bc.co.uk/index.html"
target=_blank></A> </DIV></DIV></DIV></DIV>
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