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<DIV><FONT face=Arial size=2>Hello William,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks for the reply. I was mis-thinking twisting
wires and EMF, not RFI. Also something inverter manufacturers should
consider.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Best regards,</FONT></DIV>
<DIV><FONT face=Arial size=2>Joel Davidson</FONT></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=william@millersolar.com href="mailto:william@millersolar.com">William
Miller</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=re-wrenches@lists.re-wrenches.org
href="mailto:re-wrenches@lists.re-wrenches.org">RE-wrenches</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, March 28, 2009 9:41
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [RE-wrenches] Odd Outback
FNDC/Mate issue</DIV>
<DIV><BR></DIV><FONT size=3>Joel:<BR><BR>I am correcting you. Twisting
wires causes cancellation of RF energies. This is true for wires that
have RF energy on them that you wish to keep from emitting RF energy or wires
that do not have RF energy and you wish to prevent them from receiving RF
energy.<BR><BR>Therefore, if one could twist battery cables tightly enough,
one might reduce RF emitted from them. This is not always practical for
4/0 cables, but is practical for small gauge sensor wires.<BR><BR>One of the
best wires for rejecting RF energy is your garden variety Cat 5 cable.
We use it to send audio signals (I volunteer as a technician for entertainment
events) for up to 2,000 feet and in the same cable is a ring line with 100 VAC
at 20 cycles. There is no cross talk. What also makes this
possible is the audio signals are a true balanced signal -- every
electron that moves one direction causes another electron to move the other
direction in the other cable. This allows "common mode rejection."
This is cancellation of any induced signal. The induced signal causes
electrons to move in the same direction at the same time in both wires of the
pair. This equi-direction signal can be easily removed by a transformer
or matched linear amplifiers.<BR><BR>I go into this detail only in hopes
engineers with Outback might see if these principals might be applied to
future designs.<BR><BR>William Miller<BR><BR><BR>At 09:17 AM 3/28/2009, you
wrote:<BR><BR>
<BLOCKQUOTE class=cite cite="" type="cite">Please correct me if I am wrong,
but I thought that twisting wires creates a magnetic field and increases
radio frequency interference.<BR></BLOCKQUOTE><X-SIGSEP>
<P></X-SIGSEP><U>Please note new e-mail address and domain:<BR><BR></U>William
Miller <BR>Miller Solar<BR>Voice :805-438-5600 Fax:
805-438-4607<X-TAB> </X-TAB><BR>email:
william@millersolar.com<BR><A href="http://millersolar.com/"
eudora="autourl">http://millersolar.com<BR></A>License No.
C-10-773985<BR></FONT>
<P>
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