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<DIV><STRONG><FONT size=2 face=Arial>The knot forms a crude coil, which exhibits
inductance, and therefore some inductive reactance at the AM frequency. A coil
is sometimes referred to as a choke. This knot technique is very,
very crude. It would be better to wind some turns around a ferrite core, if
a choke is what you want for noise suppression.</FONT></STRONG></DIV>
<DIV><STRONG><FONT size=2 face=Arial></FONT></STRONG> </DIV>
<DIV><STRONG><FONT face=Arial><FONT size=2>== Alex in
Maine<BR></FONT> </FONT><FONT size=2 face=Arial><EM>"The
Blue Mainie," 1960 Austin Healey 3000 BT7<BR>
"Conkling," 1946 M.G. TC #1321<BR> Former owner 1957 A-H
100-6, 1967 A-H BJ8, <BR> 1965 MG Midget
‹(•¿•)›<BR> </EM></FONT><A href="http://ai2q.org/"><FONT
size=2 face=Arial><EM>http://ai2q.org/</EM></FONT></A></STRONG></DIV>
<DIV><STRONG><EM><FONT size=2 face=Arial></FONT></EM></STRONG> </DIV>
<DIV><STRONG><EM><FONT size=2 face=Arial></FONT></EM></STRONG> </DIV>
<BLOCKQUOTE
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dir=ltr>
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=michael.oritt@gmail.com href="mailto:michael.oritt@gmail.com">Michael
Oritt</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=e-wilkins@cox.net
href="mailto:e-wilkins@cox.net">Wilko2</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Cc:</B> <A title=healeys@autox.team.net
href="mailto:healeys@autox.team.net">Austin Healey</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, December 02, 2015 8:50
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Healeys] Distributor
screen</DIV>
<DIV><BR></DIV>
<DIV dir=ltr>
<DIV style="COLOR: rgb(51,51,255)" class=gmail_default>This reminds me of
something I witnessed many years ago when I had a TR3 with an AM radio which
was picking up a lot of ignition noise--actually a very loud tick that varied
directly with the engine's speed. A mechanic showed me that simply tying
an overhand knot in the lead (no doubt a solid copper wire) from the coil to
the distributor eliminated the noise. </DIV>
<DIV style="COLOR: rgb(51,51,255)" class=gmail_default><BR></DIV>
<DIV style="COLOR: rgb(51,51,255)" class=gmail_default>I have told this story
to several people over the years and have always gotten skeptical responses
but I will go to my grave insisting that it happened. I have searched
the internet for any reference to this phenomenon and the closest I can come
is here:</DIV>
<DIV style="COLOR: rgb(51,51,255)" class=gmail_default><BR></DIV>
<DIV class=gmail_default><FONT color=#3333ff><A
href="http://physics.stackexchange.com/questions/13978/tying-knots-in-power-cables-to-prevent-power-surge-from-lightning-strikes">http://physics.stackexchange.com/questions/13978/tying-knots-in-power-cables-to-prevent-power-surge-from-lightning-strikes</A></FONT><BR></DIV>
<DIV class=gmail_default><FONT color=#3333ff><BR></FONT></DIV>
<DIV class=gmail_default><FONT color=#3333ff>Perhaps an electrical smart guy
can shed some light on why the knot works but that is my
story....</FONT></DIV>
<DIV class=gmail_default><FONT color=#3333ff><BR></FONT></DIV>
<DIV class=gmail_default><FONT color=#3333ff>Best--Michael
Oritt</FONT></DIV></DIV>
<DIV class=gmail_extra><BR>
<DIV class=gmail_quote>On Wed, Dec 2, 2015 at 7:40 PM, Wilko2 <SPAN
dir=ltr><<A href="mailto:e-wilkins@cox.net"
target=_blank>e-wilkins@cox.net</A>></SPAN> wrote:<BR>
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class=gmail_quote>
<DIV style="WORD-WRAP: break-word">
<DIV>The "screen is certainly an electronic suppression device. In the parts
lists it's called a "Suppression screen - France only" Probably works a bit
like a "Faraday cage" </DIV>
<DIV><BR></DIV>
<DIV><IMG src="cid:D3C61A2DA6284C23BC2A3CB0C3381700@atc0f226cd3237"
width=391 height=89></DIV>
<DIV><BR></DIV>
<DIV>From BMC document AKD 3513:</DIV>
<DIV><BR></DIV>
<DIV><IMG src="cid:C1643FA94E544445A3845484B1618340@atc0f226cd3237"
width=653 height=789></DIV><BR>
<DIV>
<DIV>On Dec 2, 2015, at 2:56 PM, Peter Svilans wrote:</DIV><BR>
<BLOCKQUOTE type="cite">
<DIV bgcolor="#ffffff">
<DIV><FONT size=2 face=Arial>I'm with Steve on this.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>The operative word here is "screen", which
generally means keeping out rocks and dirt.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>But these (two types of) sheet metal
"screens" fitted to the French market Healeys are on the Ignition
Cables page (MB2) in the Parts List, along with "screened" ignition leads
which look quite different than the "suppressed" leads on the same page.
France got the screened equipment, Norway, Hong Kong, Denmark and Germany
got the suppressed leads, and we got the plain ones.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2
face=Arial>Peter</FONT></DIV>_______________________________________________<BR>Support<SPAN> </SPAN><A
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<P align=left color="#000000" avgcert??>No virus found in this
message.<BR>Checked by AVG - <A
href="http://www.avg.com">www.avg.com</A><BR>Version: 2015.0.6176 / Virus
Database: 4477/11103 - Release Date: 12/03/15</P></BLOCKQUOTE></BODY></HTML>