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Generally it's not a matter of harmonic content but of strong HF field =
(fundamental) and TV saturation.
A decent PI and an HF antenna itself easily limit the radiated harmonic =
content to neglegible values.
You've probably more chances to solve your problem adding an high pass =
filter ahead of the TV set and to choke (i.e. with ferrite clips) the =
TV coax and TV cord just before the set.
73,
Mauri I4JMY
----- Original Message -----=20
From: Eric Moore=20
To: amps@contesting.com=20
Sent: Tuesday, November 28, 2000 5:41 PM
Subject: [AMPS] Low Pass Filter
Hello Amps Reflector,
I need to home brew a legal limit + low pass filter for=20
30Mhz and below. Does anyone have a schematic=20
and parts list? Any pitfalls to watch out for. I'm=20
killing the TV and the XYL is not enjoying my=20
Rag-chewing sessions!
Any help is greatly appreciated!
Thanks es 73,
Eric
K8CCA
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<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>Generally it's not a matter of harmonic =
content=20
but of strong HF field (fundamental) and TV =
saturation.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>A decent PI and an HF antenna itself =
easily limit=20
the radiated harmonic content to neglegible values.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>You've probably more chances to =
solve your=20
problem adding an high pass filter ahead of the TV set and to choke =
(i.e. with=20
ferrite clips) the TV coax and TV cord just before the =
set.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>73,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Mauri I4JMY</FONT></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Demoore@windemullerelectric.com=20
href=3D"mailto:emoore@windemullerelectric.com";>Eric Moore</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Damps@contesting.com=20
href=3D"mailto:amps@contesting.com";>amps@contesting.com</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Tuesday, November 28, =
2000 5:41=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> [AMPS] Low Pass =
Filter</DIV>
<DIV><BR></DIV>
<DIV>Hello Amps Reflector,<BR><BR>I need to home brew a legal limit + =
low pass=20
filter for <BR>30Mhz and below. Does anyone have a schematic =
<BR>and=20
parts list? Any pitfalls to watch out for. I'm <BR>killing =
the TV=20
and the XYL is not enjoying my <BR>Rag-chewing sessions!<BR><BR>Any =
help is=20
greatly appreciated!<BR><BR><BR>Thanks es=20
73,<BR>Eric<BR>K8CCA<BR></DIV></BLOCKQUOTE></BODY></HTML>
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