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<DIV><SPAN class=250462603-14052006><FONT face=Arial color=#0000ff size=2>Sounds
like the "new guy" knows a bit about electrics. Cool. You're going to have
fun with this pattern stuff! </FONT></SPAN></DIV>
<DIV><SPAN class=250462603-14052006><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV><SPAN class=250462603-14052006>
<P><FONT size=2>John Pavlick<BR><A href="http://www.idseng.com/"
target=_blank>http://www.idseng.com</A><BR> </FONT> </P>
<DIV><SPAN class=250462603-14052006><FONT face=Arial color=#0000ff size=2>BTW -
Any problem that can be solved with Ferrite beads is in fact Black Magic. It's
right up there with coiling the scope probe lead in the opposite direction to
get a cleaner signal. Who says this is a digital world?
<LOL></FONT></SPAN></DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org]<B>On Behalf Of
</B>Larry<BR><B>Sent:</B> Saturday, May 13, 2006 11:19 PM<BR><B>To:</B> NSRCA
Mailing List<BR><B>Subject:</B> Re: [NSRCA-discussion] electric interference
question<BR><BR></FONT></DIV>
<DIV><FONT face=Arial size=2>That type of glitching (power on) can be coming
from several things. The battery, ESC, BEC and motor can all be generating
noise. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>It can often be cured by changing the relative
positions of the key pieces - RX, antenna, Batts, BEC, ESC.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Usually the batts cant be moved for CG reasons -
but they can be a huge source of noise. Moving other components AWAY from the
bats can often help. Shorten up all the battery and motor leads and make sure
all connectors are in good shape. Don't route leads from servos or the BEC
near the battery. They all act like antennas and the battery is a big
generator under load.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>The esc needs to be between the battery and motor
so your choices there are limited also.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>The BEC can often be re-located fairly easily.
Keep it as far away from the batts and RX as possible. A torus on the BEC lead
sometimes helps too.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>The key element is the rx. Remember that every
wire that goes into the rx can act like an antenna as far as noise input. Keep
it as far away from ALL the other items as possible, but especially the
batteries and esc. Try re-routing the antenna. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Sometimes noise reduction in electrics seems more
like black magic than science. I have had planes that were uncontrollable
until one component was moved just an inch or two or wires were moved from one
side of the fuse to the other.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Good luck!</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Larry</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=glmiller3@cox.net href="mailto:glmiller3@cox.net">George Miller</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> Saturday, May 13, 2006 7:48
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [NSRCA-discussion] electric
interference question</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>OK, this isn't exactly a pattern plane, but
this group has a lot of expertise so I thought I'd ask here:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I have a Showtime which I've built as an
electric with AXI 5320/28 and Jeti Advance Plus Opto 90 amp ESC with a HVBEC
for RX power. The radio is a JR 9303 TX and PCMS receiver.
</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>The problem is that I am getting some RF
interference. Ground range check is OK to 100 feet with antenna down
and motor off, but when motor is turned on, the rx locks out (PCM)
until I either walk back a few yards closer, or put up the antenna. I
have gone from ppm to pcm RX, put toroid "RF Filters" on the leads from the
ESC and both elevator servo's ( plane designed with elevator servo's mounted
in tail with long leads to RX). I have also braided the wires between
the motor and the ESC<FONT face="Times New Roman" size=3>.</FONT>
My next step is to try a different ESC, but I thought I'd ask here before
shelling out a couple of hundred bucks for a new ESC. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Any other thoughts?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>George</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<P>
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