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I have been tolerating RFI into my quite expensive 35" surround sound =
stereo tv for quite some time now. By "tolerating" I just didn't =
operate when the tv was in use... Not fun. I finally got fed up and =
nailed it down today.
The symptoms were an extremely loud buzz when operating high power out =
of the left and right speakers, the left side was worse. When I =
disconnected the surround sound speakers (rear) the problem was minimal. =
I concluded the surround sound speaker wires were great receive =
antennas. The RF being picked up was getting put into the audio =
amplifier of the tv resulting in horrible noise coming out of the other =
speakers. =20
The problem was resolved by wrapping lots of turns of the speaker wire =
around ferrite cores. Each of the ferrite cores were located at the =
back of the tv. The longest surround sound speaker wire required two =
ferrite cores to squash the RF.
73,
KT6RA Ray Antasek
Check out our web site! http://www.netfeed.com/~kt6ra/
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<DIV><FONT color=3D#000000 size=3D2>I have been tolerating RFI into my =
quite=20
expensive 35" surround sound stereo tv for quite some time =
now. By=20
"tolerating" I just didn't operate when the tv was in =
use... Not=20
fun. I finally got fed up and nailed it down today.</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2>The symptoms were an extremely loud =
buzz when=20
operating high power out of the left and right speakers, the left side =
was=20
worse. When I disconnected the surround sound speakers (rear) the =
problem=20
was minimal. </FONT><FONT color=3D#000000 size=3D2>I concluded the =
surround=20
sound speaker wires were great receive antennas. The RF being =
picked up=20
was getting put into the audio amplifier of the tv resulting in =
horrible=20
noise coming out of the other speakers. </FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2>The problem was resolved by wrapping =
lots of=20
turns of the speaker wire around ferrite cores. Each of the =
ferrite cores=20
were located at the back of the tv. The longest surround sound =
speaker=20
wire required two ferrite cores to squash the RF.</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2><BR>73,<BR> =
KT6RA =20
Ray Antasek</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2>Check out our web site! <A=20
href=3D"http://www.netfeed.com/~kt6ra/";>http://www.netfeed.com/~kt6ra/</A=
><BR></FONT></DIV>
<DIV> </DIV></BODY></HTML>
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