Radio check, rudder moving - RCCanada - Canada Radio Controlled Hobby Forum
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Old 12-05-2005, 09:43 PM   #1
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Radio check, rudder moving

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Hi I'm looking for an explanation/help regarding my rudder moving back and forth while moving the radio around the airframe.

JR xp6102 TX, JR 700 rx, Futaba 3010 servos.
All servo leads are twisted.
The TX antenna is running on the outside of the bottom of the fuselage.

As I move the radio around in specific locations around the airframe the rudder will move 2", I can swing the radio back and forth and the rudder will mov eback and forth as well.

So far I've changed the RX to a JR sport 600 (brand new), no change.
I've changed the servos around, no change.
Moved the antenna only to find the location which causes the movement has changed.

Starting to think the problem is in the radio????

Any ideas/comments will be appreciated
Go for it , get low.
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Old 12-05-2005, 10:15 PM   #2
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What do you mean by radio, do you mean Transmitter? Your problem sounds very strange. Perhaps it's a damaged crystal. I doubt it's your receiver, as you've change that already. Did you replace the receiver crystal when you changed receiver?

I don't think this will be a cut and dry solution. If it's your Tx, i'm concerned, as I just bought one of those!!!

Also, what airframe and type of engine are you using, that may make a difference as well!!!

Good Luck, and hopefully someone else will have some more ideas

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Old 12-05-2005, 11:11 PM   #3
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How does the radio perform when you do a proper radio check as the manuals suggests?

I have heard that when your transmitter antenna is in close proximity to the receiver it can swamp the receiver with too much signal and this can cause the radio to act erratically.

Do a proper radio check with the engine stopped and with the engine running. If it performs fine for those 2 checks I would think it is safe to use. This in no way makes me responsible for any expenses resulting from radio failure. Just wanted to add that

The other option is to speak to a JR service technician. They are usually very helpful.
Ted LeBlanc
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Old 12-05-2005, 11:13 PM   #4
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If you get the Tx antenna too close to the Rx antenna then the signal is so strong it overlaps and you get the kind of symptoms you are desribing.

Is the Rudder servo the only one effected?
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Old 12-07-2005, 02:10 PM   #5
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Sounds like swamping to me too. The transmitter antenna within 6 in. of the reciever antenna can case swamping.
Tried for my kamikazi pilots licence. Flunked the test.
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Old 12-12-2005, 09:00 PM   #6
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Originally Posted by Canhos
I don't think this will be a cut and dry solution. If it's your Tx, i'm concerned, as I just bought one of those!!!

I don't think you have to be concerned. I have one and 4 other guys at my club have one and they've been rock solid
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