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<DIV><FONT face=Arial size=2>I want to pose a set of hypothetical situations
regarding conductors in close proximity to receiving antennas and invite
comments on the likelihood of adverse effects.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>#1 Suppose we add one more bare strand to the
multi-strand wire we use for antennas. I think we can all agree that this
would not cause a problem.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>#2 Nearly the same situation as #1 but in this case
the new strand has very thin enamel insulation and its ends are open
circuited. The new wire is parallel to the antenna and is only a
thousandth of an inch away. Will this cause a problem? I think
not.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>#3 Nearly the same situation as #2 but in this case
the new strand is place just outside the vinyl jacket of the antenna. The new
wire is parallel to the antenna but now it is separated by maybe 20 thousandth
of an inch from the other conductors. Will this cause a problem? I think
not.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>#4.Lets move the new strand of wire 100 feet away
but it is still parallel to the antenna. Will this cause a problem? I
think not.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>So the question is, is there some critical
separation distance that will let the new
strand cause problems? And what is it?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>JJ</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>--------------</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=drykert2@rochester.rr.com href="mailto:drykert2@rochester.rr.com">Del
K. Rykert</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, February 20, 2007 3:48
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion]
interference</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>Not dis-agreeing with what Ed has shared but I
wanted to share another added factor of what happens when running metal
parallel with a receiving antenna. From my ham radio knowledge other metal
wires/rods can influence the intended receiving antenna as they can become
reflectors or directors that influence the received signal. That in turn may
cause the receiver to receive distorted signals which of course cause
fits for the receiver. It was less of an issue when people ran the receiver
antenna outside of the fuse. Now many run them down the fuse in a tube which
is typically parallel to the pushrods. </FONT></DIV>
<DIV><FONT face=Arial size=2> Only meant to help the
understanding of what can occur when metal on metal noise is not the culprit.
</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2> Del</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=divesplat@yahoo.com href="mailto:divesplat@yahoo.com">Ed Deaver</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, February 19, 2007 7:56
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion]
interference</DIV>
<DIV><BR></DIV>
<DIV>My understanding is this is only a real problem if the offending wires
are all connected in essence making a metal square. Tail wires on a
flat stab, using metal conneters to metal hold downs to metal bolts make a
complete square.</DIV>
<DIV> </DIV>
<DIV>If you used some form of carbon connectors, breaking the square it
shouldn't be a problem. Have used metal on all my 40%'s as well as
pattern planes w/o problems.</DIV>
<DIV> </DIV>
<DIV>Ed<BR><BR><B><I>jfgreen <jf217green@cmc.net></I></B> wrote:</DIV>
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<DIV class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">In an effort to avoid turning
my new pattern ship into a dirt seeking comet similar to my last Oly, I’ve
been researching some possible causes, I recently read from one
source that one would or could have interference problems if when using
steel pull-pull cables and installing the antenna parallel to them inside
the fuse. I have seen a number of AC at contests w/this
configuration that seem to have no interference problems. Your
experience, thoughts please. THX -
Jerry<o:p></o:p></SPAN></FONT></DIV>
<DIV class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></DIV></DIV><BR>
<DIV><FONT size=2>--<BR>No virus found in this outgoing
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Database: 268.18.3/693 - Release Date:
2/19/2007<BR></FONT></DIV>_______________________________________________<BR>NSRCA-discussion
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