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

Futaba radio/antenna problem

Reply

Old 08-27-2003, 12:37 AM
  #1  
C62dy
Junior Member
Thread Starter
 
Join Date: Jul 2003
Location: Enfield, CT
Posts: 29
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Futaba radio/antenna problem

I have a cutout problem with my heli.
I have a Corona heli by Lite Machines. Built with the stock Fusion7 and CC speed controler, then upgrading to a hacker brushless and Jedi ESC. From the start it seemed that I was loosing signal causing the motor or ESC to cut out. It has a Deans antenna witch I located in the provided position.

I have a Futaba T6XHs
reciever FP-127DF
using a Deans two piece mini

Folowing the Deans Instructions I cut the antenna lead from the reciever from 4" to 10", installed connector, and antenna. A range check with my reciever antenna down gave me about 15' before servo twitching. Bypassing the stock Deans connector had the same effect. Having misplaced the length of antenna wire I cut off of the reciever, I taped a 3.5' length of 18Ga. wire to the reciever antenna and rechecked. I got about 55' before there was any twitching. The heli flew with no problems from a close distance. What could I do to fix this problem, and/or what did I do wrong.

Jer
C62dy is offline  
Reply With Quote
Old 08-27-2003, 01:43 AM
  #2  
RAMFlyer
My Feedback: (65)
 
Join Date: Dec 2001
Location: Orlando, FL
Posts: 895
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Antenna Problem???

If you only get 15 feet of separation between RX and TX with the Dean's mini antenna and only 55 feet with a standard length antenna I think the problem is in the transmitter or receiver, not in the antenna system.

I have recently (the past two weekends) been running some tests using my 9Z and a Dean's two piece mini antenna in preparation for using the system in a turbine-powered airframe. With the 9Z antenna totally collapsed I get out to 300 feet without any servo twitching. This is in PCM mode but I would expect PPM to be about the same, if there is no interference generated in the area. This test was done in my old radio testing airplane with engine running and not running.

I would do another test using a different receiver to see if the baseline you found of 55 feet remains the same or you are able to get further away before any servo twitching occurs.
RAMFlyer is offline  
Reply With Quote
Old 08-27-2003, 09:44 PM
  #3  
C62dy
Junior Member
Thread Starter
 
Join Date: Jul 2003
Location: Enfield, CT
Posts: 29
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Futaba radio/antenna problem

Thanks for the info. I will try and hunt down a compatable reciever to recheck the range.

Jer
C62dy is offline  
Reply With Quote
Old 08-30-2003, 01:45 PM
  #4  
C62dy
Junior Member
Thread Starter
 
Join Date: Jul 2003
Location: Enfield, CT
Posts: 29
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Futaba radio/antenna problem

A friend of mine just got back his radio and transmitter we used for the test. Both are the exact same as mine. His radio, my reciever 55'. My radio, his new reciever with stock antenna 30'. His radio and reciever we stopped at about 125'. What should I do to get the radio fixed. I have a new reciever on the way.
C62dy is offline  
Reply With Quote
Old 09-04-2003, 04:21 PM
  #5  
RAMFlyer
My Feedback: (65)
 
Join Date: Dec 2001
Location: Orlando, FL
Posts: 895
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default REPAIR

If your radio is still under warranty I would send it back to Futaba (Great Planes). See the repair and shipping info at: http://www.futabarc.com
Bottom left side of the home page has a "Service Center" button to click.

If your radio is not under warranty I have had very good success sending systems to Radio South: http://www.radiosouthrc.com
RAMFlyer is offline  
Reply With Quote
Old 09-06-2003, 01:56 PM
  #6  
C62dy
Junior Member
Thread Starter
 
Join Date: Jul 2003
Location: Enfield, CT
Posts: 29
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Futaba radio/antenna problem

Thank you again for your help again. I will get it fixed. I should still be under warranty. Only 6 months old.
C62dy is offline  
Reply With Quote
Old 09-18-2003, 09:20 PM
  #7  
C62dy
Junior Member
Thread Starter
 
Join Date: Jul 2003
Location: Enfield, CT
Posts: 29
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Futaba radio/antenna problem

I contacted futaba service center and they want the reciever. I know the the problem is in the tx and rx. I have the new rx I bought ind I'm going to run the range tests again. This problem is becoming a real pain. The antenna (Deans) has been eliminated as a cause, but I have a system that does not operate properly.

I have alerady run tests with the exact same systems and my tx and rx both show ng.I will try the tests again and let you know.

Thanks again
Jer
C62dy is offline  
Reply With Quote
Old 09-19-2003, 01:57 PM
  #8  
Bax
My Feedback: (11)
 
Join Date: Apr 2002
Location: Monticello, IL
Posts: 19,482
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Futaba radio/antenna problem

If you believe the problem imvolves both the transmitter and receiver, then by all means send them to the service center.

Bax 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