[NSRCA-discussion] ESC and RX intereference

Thu Aug 10 02:42:51 AKDT 2006

I doubt sc or dc has anything to do with it.  I had the same problem a 
couple of weeks ago and figured it was the esc, since the problem started as 
soon as I switched to a new esc.  Went into hold several times at a contest. 
After getting home and doing a range ck found I could only get 20-25' before 
going into hold with the motor running at idle.  9z/319.

I tore out the esc, unsoldered everything.  Shortened wires to an absolute 
minimum, resoldered everything back up, moved esc to the side of the fuse 
from the middle, and added a glitch buster between the rx and the esc.  It's 
been solid ever since.  Not sure what fixed it, but even a bad solder joint 
can create noise.

----- Original Message ----- 
From: "Chad Northeast" <chad at f3acanada.org>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Thursday, August 10, 2006 12:33 AM
Subject: Re: [NSRCA-discussion] ESC and RX intereference

> FWIW, I have an identical equipment setup as Adam, even placing of the
> gear is near the same.  We built the planes together, use the same
> paint, covering etc.  The only difference is I use Futaba radio gear
> (9Z, R319DPS rx)...and have never once went into hold.  I think we came
> to the conclusion that there is something going on with DC rx's and how
> they filter out noise vs. SC rx's in some setups.....as both our setups
> on DC work great, and Adam's on SC did not.
>
> Maybe someone with a bit more EE knowledge could explain why this would 
> be.
>
> Chad
>
> Adam Glatt wrote:
>
>>I'm forwarding the conversation I had with a pattern buddy to the list
>>in the hopes it will save someone else's airplane.
>>
>>Adam Glatt
>>Team Shulze
>>Team Plettenberg
>>
>>-------- Original Message --------
>>Subject: Re: ESC and RX intereference
>>Date: Wed, 09 Aug 2006 21:38:14 -0600
>>From: Adam Glatt <adam.g at sasktel.net>
>>To:
>>****
>>
>>
>>
>>
>>
>>Yikes, that sucks.
>>I was going into hold about every tenth flight with my Mantis (Xtra
>>25).  When I switched to the Twister I was going into hold about three
>>times a flight (EVO).  I tried everything (new TX antenna, new TX
>>module, new TX crystal, new RX crystal, new RX, twisting elevator servo
>>leads, choke on ESC line...).  The only things that helped were running
>>the antenna along the wing, and switching to a JR dual conversion
>>receiver.  Since switching to the DC RX I've never had a moment of hold.
>>This electric motor stuff is definitely causing interference with the
>>RX.  It is very important to set your failsafe to have the throttle go
>>to idle.  This way, when it goes into hold, it will chop the throttle,
>>which ends the interference.  I also set my failsafe to deflect the
>>rudder a bunch so it is very obvious when hold is occuring (good when
>>trying to sort out the problem, bad when trying to compete).
>>I'm betting your only solutions are switching to Futaba or Hitec TX+RX
>>systems, or using a vastly different receiver: JR DC, Berg 7 (just
>>released), Sombra Shadow, GWS...
>>
>>I have a spare ch48 JR DC RX crystal that I can send you, and I can sell
>>you a Sombra RX through work.  Other than that you'll need to source
>>your solution elsewhere.  If you want to try the Berg 7 I suggest
>>phoning Castle directly, as no dealers have it yet.
>>
>>It's also possible that a different brand ESC will fix it.  I can sell
>>you an HV85 through work for cheap.
>>
>>I've been down this road.  The EVO + Schulze system interferes with
>>something in the JR SC PCM receivers - that much I'm sure of.
>>
>>-Adam
>>
>>******* wrote:
>>
>>
>>>Hello Adam,
>>>
>>>I had a problem with my radio yesterday and I want to check with you
>>>since it maybe the same cause as you.
>>>
>>>I was trying the Evo for the first time yesterday evening at the field.
>>>I range checked before the flight but not with motor running. That may
>>>have been a big mistake now that I think about it. Anyway the flight was
>>>fine until I got to the horizontal 8. Just past the middle of the first
>>>loop down, the motor stopped and the control went to neutral. The plane
>>>was going down inverted at about 45 degree and hit the ground. I tried
>>>elevator and ailerons with no success. Amazingly, the wing, batteries,
>>>ESC, motor are fine. The prop just folded, the wing didn't come off but
>>>the aileron servo gear stripped. The other servos works ok. There are a
>>>bunch of cracks in the fuse but I put everything back in place with CA
>>>and tonight I will put some glass and carbon fibre inside. I rechecked
>>>the range after the crash, checked all connections and can't found
>>>anything. My transmitter is a 10X with the synthesizer module.
>>>
>>>My friend ***** told me the ESC may have cause the fail safe condition.
>>>The motor was back to low throttle before the fail safe happened. You
>>>say in the message below that you had interference this year. Was that
>>>only with the Evo and its ESC ? I had 122 flights with the std 30-10 and
>>>ESC with no problem at all with the R770 and the R2000 since around the
>>>middle of Jul. I was planning flying tomorrow with another TX & RX if
>>>the plane was ready but now I am thinking of checking the range with the
>>>motor running before going to the field again.
>>>
>>>What do you think ?
>>>
>>>******
>>>
>>>
>>>
>>>
>>>
>>>>-----Original Message-----
>>>>From: nsrca-discussion-bounces at lists.nsrca.org
>>>>[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Adam
>>>>Glatt
>>>>Sent: July 4, 2006 11:10 PM
>>>>To: NSRCA Mailing List
>>>>Subject: [NSRCA-discussion] WTBuy or WTBorrow: JR Dual Conversion
>>>>receiver crystals (red) ch48 and ch30
>>>>
>>>>
>>>>I've been having nonstop radio interference problems this year but
>>>>finally solved it by installing a JR dual conversion PCM receiver.
>>>>However, I don't have receiver crystals for this receiver on the
>>>>channels I'm set to fly in Muncie.  I need the red JR dual conversion
>>>>receiver crystals in channels 48 and 30.  I'll buy them or borrow them
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>>during Muncie.
>>>>
>>>>-Adam
>>>>
>>>>
>>
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>>
>>
>>
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