Bad luck with Magnum NX - Need help  
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Bad luck with Magnum NX - Need help - 6/30/2007 9:04:22 AM   
RobertMP


 

Posts: 10
Joined: 6/30/2007
From: Aabybro, DENMARK
Status: offline 		I recently purchased a Magnum NX but havn't had much luck with it.
It all started when I had to burn-in the engine. It was dead! The glow plug was dead and after a replacement it ran smooth.
After a few tanks of fuel had been consumed by the engine I started slowly moving the car around.

Now my real problems began!
When the car was +10 meters from me it went bezerk and I lost control of the car.
I shut the engine down and started testing. It became apparent that the radio range was less than 10 meters.
I went to my local shop and they told me to replace the reciever. So I bought a new reciever. Didn't help!

I then purchased some really good batteries to see if the problem was related to battery power. Still no luck!

I then contacted a friend and we tried using his batteries and crystals... Still no improvement in range.

You might think it's the transmitter by now. Well so did I, so I ran out and bought a new transmitter. Still no luck!

I have now replaced crystals, transmitter, reciever and installed 2500mA batteries and it's still less than 10 meter range.

I really need some help. The "ohh this is fun experience" is turning into frustration!

I could have bought the biggest CEN RC car instead of all the money I proured into my Magnum, just to get it to work and it's still not working!

Edit: Changed sender to transmitter


< Message edited by RobertMP -- 6/30/2007 12:11:49 PM >
       Post #: 1

RE: Bad luck with Magnum NX - Need help - 6/30/2007 9:27:17 AM   
diggernz


 

Posts: 26
Joined: 11/27/2005
From: chch, NEW ZEALAND
Status: offline 		maybe its the transmitter. transmitter batteries OK? some xtals dont work with some radio geat. Its best to stick to all the same make in each model if you can.

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(in reply to RobertMP)
       Post #: 2

RE: Bad luck with Magnum NX - Need help - 6/30/2007 9:29:32 AM   
RobertMP


 

Posts: 10
Joined: 6/30/2007
From: Aabybro, DENMARK
Status: offline 		woops. I named the transmitter the sender..

Other than that. I also installed the 2500mA batteries in the transmitter

(in reply to diggernz)
       Post #: 3

RE: Bad luck with Magnum NX - Need help - 6/30/2007 1:47:25 PM   
SOILWORK



Posts: 797
Joined: 2/22/2006
From: WARWICK, RI, USA
Status: offline 		Check the servos...they could be glitching.

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(in reply to RobertMP)
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RE: Bad luck with Magnum NX - Need help - 6/30/2007 2:36:54 PM   
RobertMP


 

Posts: 10
Joined: 6/30/2007
From: Aabybro, DENMARK
Status: offline 		"glitching". Can you please explain what that is and how to test it?

(in reply to SOILWORK)
       Post #: 5

RE: Bad luck with Magnum NX - Need help - 6/30/2007 4:42:58 PM   
SOILWORK



Posts: 797
Joined: 2/22/2006
From: WARWICK, RI, USA
Status: offline 		Put the truck on a stand and keep the transmitter off but turn on the reciever and move the servo wires and battery wires and see if the servos twitch. If there is twitching, use heat shrink tubing around the wires to help insulate from interference. This happened to my Nemesis, the battery wire was causing interference with the throttle servo and it would lock at wot. Somtimes it could be a simple thing as a couple of wires being to close together or if the wires are close to a metal component such as the throttle or brake linkage..I hope this is some help.

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(in reply to RobertMP)
       Post #: 6

RE: Bad luck with Magnum NX - Need help - 6/30/2007 5:04:06 PM   
RobertMP


 

Posts: 10
Joined: 6/30/2007
From: Aabybro, DENMARK
Status: offline 		I will try that tonight!
Thx a lot for the info from your experiences.
I apriciate all the info I can get

(in reply to SOILWORK)
       Post #: 7

RE: Bad luck with Magnum NX - Need help - 6/30/2007 5:35:59 PM   
SOILWORK



Posts: 797
Joined: 2/22/2006
From: WARWICK, RI, USA
Status: offline 		I forgot to add that somtimes, nitro engines when running can also cause some interference.

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(in reply to RobertMP)
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RE: Bad luck with Magnum NX - Need help - 6/30/2007 8:18:37 PM   
RobertMP


 

Posts: 10
Joined: 6/30/2007
From: Aabybro, DENMARK
Status: offline 		Ehh and how am I supposed to prevent that from giving me bad signal reception?

(in reply to SOILWORK)
       Post #: 9

RE: Bad luck with Magnum NX - Need help - 6/30/2007 8:39:01 PM   
SOILWORK



Posts: 797
Joined: 2/22/2006
From: WARWICK, RI, USA
Status: offline 		Insulate the wires with heat shrink, you have to experiment with the placement of all the wiring. Like I said before servo glitching can be caused by the wires being to close to something electrical ar metal. Once you find a setup with no interference, secure the wires down so they dont move around when driving over rough terrain. This is a problem with a simple fix if it is your servo glitching.

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(in reply to RobertMP)
       Post #: 10

RE: Bad luck with Magnum NX - Need help - 6/30/2007 9:25:34 PM   
derrick05


 

Posts: 324
Joined: 4/20/2007
From: Brevard, NC, USA
Status: offline 		Did you cut the antenna wire?

(in reply to SOILWORK)
       Post #: 11

RE: Bad luck with Magnum NX - Need help - 6/30/2007 10:41:19 PM   
RobertMP


 

Posts: 10
Joined: 6/30/2007
From: Aabybro, DENMARK
Status: offline 		Nope. I did not cut it. But it is very long compared to the plastic tube which is on the car. It hangs out as far as it can without any danger of getting in the wheels. The rest is folded in the battery casing.

(in reply to derrick05)
       Post #: 12

RE: Bad luck with Magnum NX - Need help - 7/1/2007 4:13:36 PM   
derrick05


 

Posts: 324
Joined: 4/20/2007
From: Brevard, NC, USA
Status: offline 		Try alkaline batteries in the remote and see what happens.You say you have 2500 rechargables.If they were new,on their first charge,then the batteries arent doing their job.It takes at least two charges to properly cycle new rechargable batteries.The first charge,straight out of the pack will provide you with less than half power.It isnt until you run that charge out and recharge, that you will start to see the real power of the batteries.

(in reply to RobertMP)
       Post #: 13

RE: Bad luck with Magnum NX - Need help - 7/1/2007 5:10:38 PM   
Hordsak


 

Posts: 542
Joined: 5/31/2007
From: Maple Ridge, BC, CANADA
Status: offline 		I wonder if having the antenna wire folded up in the box could be causing something. I would try un-folding the wire, and extend it fully out the tube. If it's really long, twist it around the tube.

(in reply to derrick05)
       Post #: 14

RE: Bad luck with Magnum NX - Need help - 7/1/2007 5:21:02 PM   
The Real Dogman



Posts: 1957
Joined: 5/5/2006
From: Tucson, AZ, USA
Status: offline 		Hey hordsak, you beat me to it, I just saw this thread last night and thought this morning. Well you are right if you have wad of wires that are powered you will naturally create Electro magnetic frequencies and your antenna being waded up in that mess it will pick up those frequencies.. So good call hardsak!!

Robert your antenna wire all the out of the tube let it hang down the antenna tube then slip a 1/4" peice of fuel tube over it to keep it under control.

Good luck!!!


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RE: Bad luck with Magnum NX - Need help - 7/2/2007 4:41:34 AM   
rolland


 

Posts: 794
Joined: 8/15/2004
From: Tacoma, WA, USA
Status: offline 		I would also suggest using alkaline battery's in the TX. Rechargables have a lower voltage than regular alkalines it doesn't matter how many times you cycle them the voltage will always be lower.



rolland

(in reply to The Real Dogman)
       Post #: 16

RE: Bad luck with Magnum NX - Need help - 7/2/2007 8:08:22 AM   
RobertMP


 

Posts: 10
Joined: 6/30/2007
From: Aabybro, DENMARK
Status: offline 		I have an additional question, which I am not sure is related to my problems or a "feature"

When I give the throttle full speed and pull the brake fast, the servo just goes to neutral.
But if I relase the throttle and keep it at neutral for 0,5 seconds or more and then pull the brake it actually brakes.
I find that a bit odd and it often leaves me with a car that doesn't break when I want it to.

This is not related to the range between transmitter and reciever. This occurs even within cemtimers between transmitter and reciever.

(in reply to rolland)