RC Radios, Transmitters, Receivers, Servos, gyros Discussion all about rc radios, transmitters, receivers, servos, etc.

lost signal, futaba receiver problems

Reply

Old 05-28-2003, 08:46 PM
  #1  
raptorv2
Junior Member
Thread Starter
 
Join Date: May 2003
Location: uk
Posts: 8
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default lost signal, futaba receiver problems

my helicopter keeps not responding although my transmitter is ok and ive tried another transmitter and different x tals in another heli, any help would be great.
thanks
raptorv2 is offline  
Reply With Quote
Old 05-28-2003, 08:54 PM
  #2  
FLYBOY
My Feedback: (11)
 
FLYBOY's Avatar
 
Join Date: Jan 2002
Location: Missoula, MT
Posts: 9,036
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default lost signal, futaba receiver problems

What are you running, PCM or FM?

Have you tried another reciever in the heli and made sure that it worked? Is there something rubbing in the heli to be messing up the signal? Does the reciever work when the engine is not running?

We need a bit more info to help you out, but these are the things I would check first. See if you can isolate it to the reciever, or the helicopter. If it is one or the other, you will be able to get a better idea of what to do next.
FLYBOY is offline  
Reply With Quote
Old 05-28-2003, 09:18 PM
  #3  
raptorv2
Junior Member
Thread Starter
 
Join Date: May 2003
Location: uk
Posts: 8
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default ok

its running on ppm, the heli is a brand new raptor v2, the receiver came from ebay. my transmitter is a jr 3810 receiver futaba with appropriate x tals, after setup and switch on if i move my tx away approx 2 foot and wave it arround the servos stop responding for a second then start up again, ive tried my receiver in my sons raptor, he has a futaba tx and the problem is still there.
any help,
thanks
raptorv2 is offline  
Reply With Quote
Old 05-28-2003, 09:49 PM
  #4  
Ross Kean
Senior Member
 
Ross Kean's Avatar
 
Join Date: Jun 2002
Location: Fredericton, NB, CANADA
Posts: 686
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default lost signal, futaba receiver problems

In North America, the shift of the Futaba and JR equipment are opposite to each other so the receivers will not work with each other's Tx. Don't know about the UK. Where did the receiver come from? AS with anything on EBAY, it's buyer beware!

Ross
Ross Kean is offline  
Reply With Quote
Old 05-28-2003, 09:52 PM
  #5  
WreckRman2
Banned
My Feedback: (5)
 
Join Date: May 2002
Location: Indianapolis, IN,
Posts: 1,494
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default lost signal, futaba receiver problems

You can't use a Futaba RX with a JR radio...
WreckRman2 is offline  
Reply With Quote
Old 05-28-2003, 09:55 PM
  #6  
randy41
Senior Member
 
Join Date: May 2003
Location: Charlestown, IN
Posts: 585
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default lost signal, futaba receiver problems

I didn't think you could use a JR tx with a Futaba
receiver. But sense your friends radio(Futaba) done the same thing. I would say the receiver might be bad.
On futaba radios if the radio is set to PCM then the receiver
should be a PCM receiver and vise versa radio set too
ppm the reciever should be a ppm receiver.
randy41 is offline  
Reply With Quote
Old 05-28-2003, 10:11 PM
  #7  
raptorv2
Junior Member
Thread Starter
 
Join Date: May 2003
Location: uk
Posts: 8
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default lost signal, futaba receiver problems

i was told that its ok to use a futaba receiver with a jr tx as long as they have special x tals and a friend has the same and no problems, and i was told its ok to use them by an expert, it must be the receiver at fault
raptorv2 is offline  
Reply With Quote
Old 05-29-2003, 01:47 PM
  #8  
FLYBOY
My Feedback: (11)
 
FLYBOY's Avatar
 
Join Date: Jan 2002
Location: Missoula, MT
Posts: 9,036
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default lost signal, futaba receiver problems

Hmmmm, don't know what to tell you. My experts have said they are not compatible so I don't know what to tell you to try. If it were me, I would buy a JR receiver for a JR transmitter, but thats just me.
FLYBOY is offline  
Reply With Quote
Old 05-29-2003, 02:37 PM
  #9  
JohnBuckner
My Feedback: (1)
 
JohnBuckner's Avatar
 
Join Date: Dec 2001
Location: Kingman, AZ
Posts: 10,419
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default lost signal, futaba receiver problems

The North American market is the only one where different modulation shifts are used by different manufacturers. Radios sold in the UK are of the same shift and compatable.


Raptor if your Rx came from offshore then that could explain your problem. Even if that is not the case I would be most suspious of anything from E bay.

John
JohnBuckner is offline  
Reply With Quote
Old 05-29-2003, 02:54 PM
  #10  
JohnBuckner
My Feedback: (1)
 
JohnBuckner's Avatar
 
Join Date: Dec 2001
Location: Kingman, AZ
Posts: 10,419
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Another Consideration

You also mention something about 'special crystals'. Never mix crystal brands. If its a JR Rx then use only a JR crystal thats on the needed channel. Now on top of that if your JR Rx is a dual conversion type then that crystal must be a JR dual conversion crystal and conversely if your JR Rx is the single conversion type then the crystal must be a JR single conversion crystal. They are 'not' interchangeable.

John
JohnBuckner is offline  
Reply With Quote

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service