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Old 10-18-2010, 09:00 AM   #826
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Originally Posted by PMSorber View Post
Sounds to me that the receiver box is too much RF-closed, had this problem in the past with the ALU receiver box as well...
dont know guys we got 4 mrx5 running on the team 1 4pk 1 mx11x and 2 ko systems on the team and no one has any problems i did but knew it was the life....
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Old 10-18-2010, 11:00 AM   #827
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it also depends on the materials of the stand at your track, and how
far that place where the runaway usually happens, for instance!
what i do know for sure is that some radios will work just fine
with only 6 volts, others will have issues with 6.6 or worse with 7.4
no matter which equipment i use i'd try with a 6 volt rx battery in good
shape and from there see what is goind on, sometimes even a cell from
a 6 volt battery can go bad causing this, of course we can not
make sure as if using the balance feature of lipos and life but ive seen this
also! i dont think its a thing of the mrx5 design at all, and like martinez said, it was
very popular issue that for the 4pk overheating receiver when not cooling enough!
and for the 4pks, it is the only receiver that now can handle life and lipos, the 4pk did not!
good luck
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Old 10-18-2010, 02:12 PM   #828
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It's not the MRX5 and it's not the spektrum. I ran 25 minute B main and a 45 minute A main with out a problem, of course that's after all day saturday qualifiers and practice.

Every MRX5 either made the A or B main. 6 of them in the A

I would make sure that your antenna wire is NOT CROSSING your servo wires
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Old 10-18-2010, 02:59 PM   #829
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Originally Posted by CFowler View Post
It's not the MRX5 and it's not the spektrum. I ran 25 minute B main and a 45 minute A main with out a problem, of course that's after all day saturday qualifiers and practice.

Every MRX5 either made the A or B main. 6 of them in the A

I would make sure that your antenna wire is NOT CROSSING your servo wires
Chris after seeing your 5 in the B & A I think you can take off the pilot comment ur surely not having those issues
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Old 10-18-2010, 10:49 PM   #830
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Default Radio problem with MRX5

I had some similar issues with radio glitches at our national championships a few weeks back (radio loses signal for about .1 to .5 of a sec) at high speed sections of the track.
Others here have experience the same issue. It's hard to pin point the problem as we all use different radio and servo brands. I was using the life battery for the first time at this
event when the problem started.

Ended up going back to the Lipo setup which has been 100% reliable for the last 2 years.....and no problems since (Fingers crossed).

P.S I am pretty sure most of the spektrum receiver is rated at 9V. Mine is anyway........
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Old 10-19-2010, 03:34 AM   #831
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Thank God, I rarely get into radio problems ( thank you Lord ) ever since I started this hobby 25 years ago.

My radio gears are old stuffs...., 3pk gold and 3pk black transmitter with dozen of R113iP 1024PCM receivers. Some of the receivers were from 1993, bought mostly from tower hobbies ( hoorayyy..... 17 years old !!! )

My recent radio problem was 2 1/2 months ago, ..... my pitman squezzed the fuel bottle too hard during refueling ( minute 40, position 4th going 3rd ) and I guess the fuel spilled over the receiver's electronics. The car didn't response after refueling.
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Old 10-20-2010, 09:41 AM   #832
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Default New Stuff

We have been working on a few things......
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Old 10-20-2010, 10:12 AM   #833
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Default a few more

more stuff........
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MUGEN SEIKI MRX5-imag0075.jpg   MUGEN SEIKI MRX5-imag0073.jpg   MUGEN SEIKI MRX5-imag0064.jpg  
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Old 10-20-2010, 10:15 AM   #834
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You guys are having me think about staying with the 4X and not getting the 5
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Old 10-20-2010, 10:18 AM   #835
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Default one more

last one foe awhile...
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Old 10-20-2010, 10:18 AM   #836
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more stuff........
Very nice
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Old 10-20-2010, 12:58 PM   #837
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Originally Posted by mugenize1 View Post
You guys are having me think about staying with the 4X and not getting the 5
I'd go with the 5. A couple of us have been running them for several weeks with no radio problems. The car is faster than the 4X. I can't believe how well mine handles. We are both using ko 2.4 though.

I'm having so much fun with this car.
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Old 10-20-2010, 01:30 PM   #838
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I'd go with the 5. A couple of us have been running them for several weeks with no radio problems. The car is faster than the 4X. I can't believe how well mine handles. We are both using ko 2.4 though.

I'm having so much fun with this car.
Thats what I have the KoPropo with the spectrum RX-3001 hope I do not get any runways. I never had that problem with the 4X.
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Old 10-20-2010, 04:02 PM   #839
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Don't get me wrong the 5 is the faster car straight out of the box and easier to maintain. I will be trying some of the suggestion mention in the previous post to safeguard from any further radio glitches.

So has anyone learn anything new, in-terms of setup which they care to share......
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Old 10-20-2010, 05:33 PM   #840
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Default Radio Problems

Try disconnecting your transponder first and see if this fixes it.

I had the same problem at the 2000 Worlds using a R1 control and JR servos. This was the first event that I had to use a PT. I had the same type of problem where the radio felt like it went into to fail safe mode for half a second and it only happened in one part of the track. This corner was at the end of the staight into a tight 180deg corner so I was using full brakes and full right steering lock at the same time. If I backed of a little earlier and was not to hard on the brakes it was ok. Back at our local track I never had the problem because the track was alot more flowing, but I did notice it a few time if I had to driver the car really hard it happen only once or twice.

I ended up using a Y-harnes and this fixed the problem.

I haven't started to build my 5, so I don't know much about the radio tray. Do you need to use lead extention to get the servo lead to reach the receiver?
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Last edited by Boz; 10-20-2010 at 09:12 PM.
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