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<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>
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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=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>
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