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<H1>More Power Line Telecommunications pollution</H1>
<P><FONT face=Tahoma><STRONG>Perry G0IFI</STRONG> has posted a video showing the
pollution produced by a home networking adapter (PLT). which is completely
ruining his radio reception.</FONT></P>
<P><FONT face=Tahoma>Polluting devices such as this are typically used to
provide an internet connection to the TV set and have been used in products such
as BT Vision.</FONT></P>
<P><FONT face=Tahoma>The YouTube description reads:</FONT></P>
<P><FONT face=Tahoma>Homeplug power line adapter/BT Vision Comtrend type network
adapter interference, which appeared yesterday evening in a house in an adjacent
street. The amateur radio bands seem to be notched EXCEPT for 12 metres
(24.890-24.990 MHz) which is particularly annoying since I have just invested in
a beam antenna for this band.</FONT></P>
<P><FONT face=Tahoma>The broadcast bands, along with the aeronautical, maritime
and other service frequencies, are obliterated, with no discernible attempt at
protecting those services having been made.</FONT></P>
<P><FONT face=Tahoma>When idling, the sound is identical to the original BT
Vision Comtrend devices, a regular high pitched whine, within the range of 22-27
mhz..</FONT></P>
<P><FONT face=Tahoma>This leads me to suspect a BT Vision installation with BT's
touted 'new' adapters. When carrying data, the result is a huge increase in
levels and bandwidth. The entire HF spectrum from around 3 to 30+ MHz is
rendered unusable. As you can see from the signal meter, this is totally
destructive, and not just a minor annoyance.</FONT></P>
<P><FONT face=Tahoma>I am in the process of tracing the source, and a complaint
has been made with the new regulator, the BBC. Since the BBC's own transmissions
are affected, I would hope they act swiftly. It's time to recognise that this
recent RF "technology" will never be able to coexist with radio users, and
compel the makers to ensure their products comply with legally permitted
emission levels.</FONT></P>
<P><FONT face=Tahoma>Even more so, now they've begun intruding on VHF, including
the FM broadcast band.</FONT></P>
<P><FONT face=Tahoma>Watch PLA_2.ASF</FONT></P>
<P><A href="http://www.youtube.com/watch?v=NvjJL5UoJgA"><FONT
face=Tahoma>http://www.youtube.com/watch?v=NvjJL5UoJgA</FONT></A></EMBED></P>
<P><FONT face=Tahoma>Power line tech could crash aircraft and shut down the
Archers<BR></FONT><A
href="http://www.southgatearc.org/news/june2010/plc_could_crash_planes.htm"
target=_blank><FONT
face=Tahoma>http://www.southgatearc.org/news/june2010/plc_could_crash_planes.htm</FONT></A></P>
<P><FONT face=Tahoma>BBC takes over Radio/TV Interference
investigation<BR></FONT><A
href="http://www.southgatearc.org/news/june2010/bbc_take_over_from_ofcom.htm"
target=_blank><FONT
face=Tahoma>http://www.southgatearc.org/news/june2010/bbc_take_over_from_ofcom.htm</FONT></A></P>
<P><FONT face=Tahoma>New EMC (electromagnetic compatibility) forum goes
live!<BR></FONT><A
href="http://www.southgatearc.org/news/may2010/new_emc_forum.htm"
target=_blank><FONT
face=Tahoma>http://www.southgatearc.org/news/may2010/new_emc_forum.htm</FONT></A></P>
<P><FONT face=Tahoma><STRONG>UKQRM</STRONG> is a group fighting this radio
interference<BR></FONT><A href="http://www.ukqrm.org/" target=_blank><FONT
face=Tahoma>http://www.ukqrm.org/</FONT></A><BR></P></BODY></HTML>