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<p class=MsoNormal><span class=EmailStyle17><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial'>Man, I’m
really having a hard time with all this technical jargon! ;-)<o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle17><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial'><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle17><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial'>RS<o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle17><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial'><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></font></span></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color=black
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;color:black'>-----Original
Message-----<br>
<b><span style='font-weight:bold'>From:</span></b>
nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org]<b><span style='font-weight:
bold'>On Behalf Of </span></b>DaveL322@comcast.net<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, August 10, 2006
2:17 PM<br>
<b><span style='font-weight:bold'>To:</span></b> NSRCA Mailing List<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [NSRCA-discussion]
ESC and RX intereference</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'>Bob,</span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'>The servo
lead is wrapped through the ring thingy 2 or 3 turns (per the ring thingy
instructions). The spectrum analyzer thingy just might happen one day
soon in the Pappas driveway. Eh Dean??</span></font><font color=black><span
style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'><br>
Dave</span></font><font color=black><span style='color:black;mso-color-alt:
windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-right:.5in;mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;margin-left:1.0in'><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'>-------------- Original message
-------------- <br>
From: Bob Richards <bob@toprudder.com> </span></font><font color=black><span
style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-right:.5in;mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;margin-left:1.0in'><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'>Dave,</span></font><font color=black><span
style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-right:.5in;mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;margin-left:1.0in'><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'> </span></font><font color=black><span
style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-right:.5in;mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;margin-left:1.0in'><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'>FWIW, the ferrite bead ("iron ring
thingy") attenuates common-mode currents on the cable. You might also try
wrapping the ESC lead through the ring more than once, this will increase the
low-frequency attenuation, but may decrease the attenuation at higher
frequencies.</span></font><font color=black><span style='color:black;
mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-right:.5in;mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;margin-left:1.0in'><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'> </span></font><font color=black><span
style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-right:.5in;mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;margin-left:1.0in'><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'>It would be interesting to put a small
current clamp on the ESC lead, connected to a spectrum analyzer, to see exactly
what type of emissions you are dealing with.</span></font><font color=black><span
style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-right:.5in;mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;margin-left:1.0in'><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'> </span></font><font color=black><span
style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-right:.5in;mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;margin-left:1.0in'><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'>Bob R.</span></font><font color=black><span
style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-right:.5in;mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;margin-left:1.0in'><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'><br>
<br>
<b><i><span style='font-weight:bold;font-style:italic'>DaveL322@comcast.net</span></i></b>
wrote:</span></font><font color=black><span style='color:black;mso-color-alt:
windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-right:1.0in;mso-margin-top-alt:auto;
mso-margin-bottom-alt:auto;margin-left:1.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'>With my
Abbra, I had throttle glitches (but no radio holds) and no amount of re-routing
wires or antenna helped. 3 different RXs made no difference (2 770s and 1
649, all SC JR). Adding a choke (the iron ring thingy) to the ESC lead
immediately adjacent to the RX fixed the problem. Of note, ESCs used were
CC Phx 45 and 85 and the glitching did not occur with setups that were <55
amps. I've now run up to 85 amps no problems.</span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-right:1.0in;mso-margin-top-alt:auto;
mso-margin-bottom-alt:auto;margin-left:1.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-right:1.0in;mso-margin-top-alt:auto;
mso-margin-bottom-alt:auto;margin-left:1.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'>I had the
same thing with my Prestige - throttle glitches but no radio holds. The
same choke helps, but wasn't a 100% fix. Rotating the RX 90 degrees (in
any orientation) had an effect, so I picked the "best" orientation
and only an occasional throttle glitch remained. I recently changed from
the 770 to the 790 (synth SC) and that is better still (99.9% fixed).</span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-right:1.0in;mso-margin-top-alt:auto;
mso-margin-bottom-alt:auto;margin-left:1.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-right:1.0in;mso-margin-top-alt:auto;
mso-margin-bottom-alt:auto;margin-left:1.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'>Regards,</span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-right:1.0in;mso-margin-top-alt:auto;
mso-margin-bottom-alt:auto;margin-left:1.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'><br>
Dave Lockhart</span></font><font color=black><span style='color:black;
mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-right:1.0in;mso-margin-top-alt:auto;
mso-margin-bottom-alt:auto;margin-left:1.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'><a
href="mailto:DaveL322@comcast.net">DaveL322@comcast.net</a></span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-right:1.0in;mso-margin-top-alt:auto;
mso-margin-bottom-alt:auto;margin-left:1.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'>Team JR</span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-right:1.0in;mso-margin-top-alt:auto;
mso-margin-bottom-alt:auto;margin-left:1.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'>Team Castle
Creations</span></font><font color=black><span style='color:black;mso-color-alt:
windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-right:1.0in;mso-margin-top-alt:auto;
mso-margin-bottom-alt:auto;margin-left:1.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-right:1.0in;mso-margin-top-alt:auto;
mso-margin-bottom-alt:auto;margin-left:1.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-right:1.5in;mso-margin-top-alt:auto;
mso-margin-bottom-alt:auto;margin-left:2.0in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'>--------------
Original message -------------- <br>
From: Chad Northeast <chad@f3acanada.org> <br>
<br>
> FWIW, I have an identical equipment setup as Adam, even placing of the <br>
> gear is near the same. We built the planes together, use the same <br>
> paint, covering etc. The only difference is I use Futaba radio gear <br>
> (9Z, R319DPS rx)...and have never once went into hold. I think we came <br>
> to the conclusion that there is something going on with DC rx's and how <br>
> they filter out noise vs. SC rx's in some setups.....as both our setups <br>
> on DC work great, and Adam's on SC did not. <br>
> <br>
> Maybe someone with a bit more EE knowledge could explain why this would
be. <br>
> <br>
> Chad <br>
> <br>
> Adam Glatt wrote: <br>
> <br>
> >I'm forwarding the conversation I had with a pattern buddy to the list
<br>
> >in the hopes! ! it wi l l save someone else's airplane. <br>
> > <br>
> >Adam Glatt <br>
> >Team Shulze <br>
> >Team Plettenberg <br>
> > <br>
> >-------- Original Message -------- <br>
> >Subject: Re: ESC and RX intereference <br>
> >Date: Wed, 09 Aug 2006 21:38:14 -0600 <br>
> >From: Adam Glatt <ADAM.G@SASKTEL.NET><br>
> >To: <br>
> >**** <br>
> > <br>
> > <br>
> > <br>
> > <br>
> > <br>
> >Yikes, that sucks. <br>
> >I was going into hold about every tenth flight with my Mantis (Xtra <br>
> >25). When I switched to the Twister I was going into hold about three <br>
> >times a flight (EVO). I tried everything (new TX antenna, new TX <br>
> >module, new TX crystal, new RX crystal, new RX, twisting elevator
servo <br>
> >leads, choke on ESC line...). The only things that helped were running
<br>
> >the antenna along the wing, and switching to a JR dual conversion <br>
> >receiver! . ! Sin ce s witching to the DC RX I've never had a moment
of hold. <br>
> >This electric motor stuff is definitely causing interference with the <br>
> >RX. It is very important to set your failsafe to have the throttle go <br>
> >to idle. This way, when it goes into hold, it will chop the throttle, <br>
> >which ends the interference. I also set my failsafe to deflect the <br>
> >rudder a bunch so it is very obvious when hold is occuring (good when <br>
> >trying to sort out the problem, bad when trying to compete). <br>
> >I'm betting your only solutions are switching to Futaba or Hitec TX+RX
<br>
> >systems, or using a vastly different receiver: JR DC, Berg 7 (just <br>
> >released), Sombra Shadow, GWS... <br>
> > <br>
> >I have a spare ch48 JR DC RX crystal that I can send you, and I can
sell <br>
> >you a Sombra RX through work. Other than that you'll need to source <br>
> >your solution elsewhere. If you want to! try ! the Ber g 7 I suggest <br>
> >phoning Castle directly, as no dealers have it yet. <br>
> > <br>
> >It's also possible that a different brand ESC will fix it. I can sell <br>
> >you an HV85 through work for cheap. <br>
> > <br>
> >I've been down this road. The EVO + Schulze system interferes with <br>
> >something in the JR SC PCM receivers - that much I'm sure of. <br>
> > <br>
> >-Adam <br>
> > <br>
> >******* wrote: <br>
> > <br>
> > <br>
> >>Hello Adam, <br>
> >> <br>
> >>I had a problem with my radio yesterday and I want to check with
you <br>
> >>since it maybe the same cause as you. <br>
> >> <br>
> >>I was trying the Evo for the first time yesterday evening at the
field. <br>
> >>I range checked before the flight but not with motor running. That
may <br>
> >>have been a big mistake now that I think about it. Anyway the
flight was <br>
> &g! t;>f i! ne unti l I got to the horizontal 8. Just past the
middle of the first <br>
> >>loop down, the motor stopped and the control went to neutral. The
plane <br>
> >>was going down inverted at about 45 degree and hit the ground. I
tried <br>
> >>elevator and ailerons with no success. Amazingly, the wing,
batteries, <br>
> >>ESC, motor are fine. The prop just folded, the wing didn't come
off but <br>
> >>the aileron servo gear stripped. The other servos works ok. There
are a <br>
> >>bunch of cracks in the fuse but I put everything back in place
with CA <br>
> >>and tonight I will put some glass and carbon fibre inside. I
rechecked <br>
> >>the range after the crash, checked all connections and can't found
<br>
> >>anything. My transmitter is a 10X with the synthesizer module. <br>
> >> <br>
> >>My friend ***** told me the ESC may have cause the fail safe
condition. <br>
> >>The moto! r was b ack ! to low throttle before the fail safe
happened. You <br>
> >>say in the message below that you had interference this year. Was
that <br>
> >>only with the Evo and its ESC ? I had 122 flights with the std
30-10 and <br>
> >>ESC with no problem at all with the R770 and the R2000 since
around the <br>
> >>middle of Jul. I was planning flying tomorrow with another TX
& RX if <br>
> >>the plane was ready but now I am thinking of checking the range
with the <br>
> >>motor running before going to the field again. <br>
> >> <br>
> >>What do you think ? <br>
> >> <br>
> >>****** <br>
> >> <br>
> >> <br>
> >> <br>
> >> <br>
> >> <br>
> >>>-----Original Message----- <br>
> >>>From: nsrca-discussion-bounces@lists.nsrca.org <br>
> >>>[mailto:nsrca-discussion-bounces@lists.nsrca.org] On Behalf Of
Adam <br>
> >>>Glatt <! BR>> >&! gt;> Sent: July 4, 2006 11:10
PM <br>
> >>>To: NSRCA Mailing List <br>
> >>>Subject: [NSRCA-discussion] WTBuy or WTBorrow: JR Dual
Conversion <br>
> >>>receiver crystals (red) ch48 and ch30 <br>
> >>> <br>
> >>> <br>
> >>>I've been having nonstop radio interference problems this year
but <br>
> >>>finally solved it by installing a JR dual conversion PCM
receiver. <br>
> >>>However, I don't have receiver crystals for this receiver on
the <br>
> >>>channels I'm set to fly in Muncie. I need the red JR dual
conversion <br>
> >>>receiver crystals in channels 48 and 30. I'll buy them or
borrow them <br>
> >>> <br>
> >>> <br>
> >>> <br>
> >> <br>
> >> <br>
> >> <br>
> >>>during Muncie. <br>
> >>> <br>
> >>>-Adam <br>
> >>> <br>
> >>> <br>
> > <! BR>> >________! _______ ________________________________ <br>
> >NSRCA-discussion mailing list <br>
> >NSRCA-discussion@lists.nsrca.org <br>
> >http://lists.nsrca.org/mailman/listinfo/nsrca-discussion <br>
> > <br>
> > <br>
> > <br>
> _______________________________________________ <br>
> NSRCA-discussion mailing list <br>
> NSRCA-discussion@lists.nsrca.org <br>
> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
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mso-margin-bottom-alt:auto;margin-left:1.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'>_______________________________________________<br>
NSRCA-discussion mailing list<br>
NSRCA-discussion@lists.nsrca.org<br>
http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</span></font><font
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