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Old 08-31-2008, 07:33 PM
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Rogkx250
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Default Radio interfernce

OK i have a 33% extra 330s with 95cc gas.
my prob is with the plane not running every thing works fine.
Then when i start it my left AIL jumps up and down even more if i rev the motor, rutter moves also.
i thought it might be my receiver, so i bought a new scan select JR PCM 770 rec.
still have same problem if anyone can help please i wanna fly my plane
im useing a JR 6102 radio
Old 08-31-2008, 07:45 PM
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RC Extreme power
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Default RE: Radio interfernce

There is a couple things to check, What materiel did you use for throttle linage, How close is your receiver to the engine electronics and batteries, what type of ignition, Shielded or non shielded, If non shielded do have a R plug in the engine.

Milton
Old 08-31-2008, 08:11 PM
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AirWizard
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Default RE: Radio interfernce

look for metal to metal contact on the throttle linkage. Like mentioned above the ignition electronics and igination battery need to be seperated from the RX electronics.
Old 09-01-2008, 10:26 AM
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dirtybird
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Default RE: Radio interfernce

If its only the left aileron have you tried replacing the servo?
Old 09-01-2008, 04:39 PM
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Rogkx250
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Default RE: Radio interfernce

Its also on the rutter i can shut the motor off everything works fine. Its when the motors runing only.
and yes its has R plug.
Old 09-01-2008, 04:57 PM
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dirtybird
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Default RE: Radio interfernce

Try it with the aileron servo disconnected.
Old 09-01-2008, 07:50 PM
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Default RE: Radio interfernce

Also make sure the spark plug cap is pushed on all the way.

Karol
Old 09-01-2008, 08:01 PM
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Default RE: Radio interfernce

Are you using Y harness in the controls that do not fuction right? Capt,n
Old 09-01-2008, 09:29 PM
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Rogkx250
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Default RE: Radio interfernce

I am useing a reverser on the elevator
my throttle is metal but my conectors are plastic.
and a Y-harnes on ails.
Do i need to change radio or different reciver?
Old 09-01-2008, 09:58 PM
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RC Extreme power
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Default RE: Radio interfernce

Try unplugging the throttle servo from the receiver and work it by hand to see if that stops it, if so you know where to start and solve your problem.

Milton
Old 09-01-2008, 10:34 PM
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kwilliby
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Default RE: Radio interfernce

If you have a metal cap on the sparkplug, try puting a narrow hose clamp around the base. I had one that was loose just a tiny bit and caused all kinds of problems. The metal can vibrate against the spark plug and cause lots of problems for the receiver.
Old 09-02-2008, 08:19 AM
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Rogkx250
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Default RE: Radio interfernce

I have tried everything yall have told me and still the same.
What if i went to 2.4 radio?
allso i want to think all for helping me.



I bought this plane from a friend and it worked fine for him.
Old 09-02-2008, 08:40 AM
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Default RE: Radio interfernce

Though going to 2.4 would more than likely work it would simply be masking the problem which could come back and bite you. Ideally you should fix the problem and then decide if you want to make a change.

Karol
Old 09-02-2008, 09:39 AM
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Default RE: Radio interfernce

2.4 will only mask the problem as stated above.

Ensure the ignition module is at least 12" away from the Rx and has been stated before no metal too metal contact anywhere.

Cheap Y leads have been known to cause this type of problem in the past, if you can get rid of them and use seperate inputs for each servo, if your Tx can do this, what Tx do you have?

Mike
Old 09-02-2008, 12:56 PM
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Rogkx250
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Default RE: Radio interfernce

ok i just bought a spectrum 2.4 and still same but i am useing a Y-harness and reverser on ail and rutter.
Old 09-02-2008, 03:16 PM
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Default RE: Radio interfernce

I used a cheapie Y harness once to to connect two aileron servos and had difficulty in finding out that it was the problem. Replaced it with a better quality unit and the problem went away.

Karol
Old 09-04-2008, 09:21 PM
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Rogkx250
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Default RE: Radio interfernce

Thx for the help i found out it was the igntion. I change it out and everything is fine.
Thx to all that help.




Old 09-05-2008, 01:31 PM
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Default RE: Radio interfernce

What ignition did you have in it?
Old 09-05-2008, 09:10 PM
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Default RE: Radio interfernce


ORIGINAL: BaldEagel

2.4 will only mask the problem as stated above.

Ensure the ignition module is at least 12" away from the Rx and has been stated before no metal too metal contact anywhere.

Cheap Y leads have been known to cause this type of problem in the past, if you can get rid of them and use seperate inputs for each servo, if your Tx can do this, what Tx do you have?

Mike
I AGREE...I wil never use a Y harness on anthing that flys. Capt,n
Old 09-06-2008, 10:49 AM
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dirtybird
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Default RE: Radio interfernce

A Y harness is nothing more than a parallel connection. Using separate wires from the receiver simply moves the parallel connection back inside the receiver. If the Y harness has good connectors and is well made there should be no reason not to use them.
As for 2.4 masking the interference. That's what you want isn't it? 2.4GHS is less suseptible to interference because the shielding on the ignition is much more effective at that frequency than it is for 72 or 35 MHZ. Thats not the same as PCM. PCM separates the signal from the noise by code recognition. That makes it better than PPM but still not as good as 2.4GHZ. PCM picks the signal out of the ignition noise, 2.4 prevents the ignition noise from getting there.
Old 09-06-2008, 10:58 PM
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Default RE: Radio interfernce


ORIGINAL: dirtybird

A Y harness is nothing more than a parallel connection. Using separate wires from the receiver simply moves the parallel connection back inside the receiver. If the Y harness has good connectors and is well made there should be no reason not to use them.
As for 2.4 masking the interference. That's what you want isn't it? 2.4GHS is less suseptible to interference because the shielding on the ignition is much more effective at that frequency than it is for 72 or 35 MHZ. Thats not the same as PCM. PCM separates the signal from the noise by code recognition. That makes it better than PPM but still not as good as 2.4GHZ. PCM picks the signal out of the ignition noise, 2.4 prevents the ignition noise from getting there.
Good post. I think 2.4 is great for our electric stuff also for the same reasons. If you now use a system that is not susceptible to this kind of RF interference, why worry about it. I agree.
Old 09-08-2008, 08:03 AM
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Default RE: Radio interfernce


ORIGINAL: Rogkx250

ok i just bought a spectrum 2.4 and still same but i am useing a Y-harness and reverser on ail and rutter.
Now you have a Spektrum you can get rid of the Y harness and the reversers, less to go wrong.

Mike

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