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Old 06-13-2004, 02:02 AM   #1
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Default Only glitching when racing...

This really has me going. Yesterday I went to the track and only glitched when I was about to start a race(6 cars on the track). I practiced with my car at the start of the day, at the end of the day and once in between and it didn't glitch once(with other cars on the track). When I put my car on the track to race it glitched so bad I had to pull it and never completed a lap.

What gets me is it was perfect in practice. Nobody was on my channel. I tried 4 different crystal sets(all work and arn't damaged). 75mhz and on channel 86 the closest was 84. I actually practiced with the guy running 84 when I went out on the track for practice.

Wtf? It isn't my car or transmitter becuase it worked perfectly during practice. Any ideas? I'm completely stumped.

P.s. - My car worked perfectly last week.
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Old 06-13-2004, 02:16 AM   #2
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Perhaps it could be your TX batteries, you could try a 9th cell in it....but if it was working before with 8, this shouldn't be a problem.

My friend was using a Reedy motor cooling heatsink/fan and had a lot of glitching because of it.
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Old 06-13-2004, 03:32 AM   #3
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In the past I've had days like you described....remember, just because you diddn't glitch on a perticular race day dosn't mean you weren't right on the verge of it..... It could be a number of things....If you havent already ,the first thing on the list I would do is put a set of 1.5 volt (not 1.2 volt like rechargables) energizer E2 double A's.....they hold a steady 1.5 volts for longer than any of the others i've tried.....also try a couple different motors in the car to rule that out.....if you dont have already, try to have your antenna wire go directly from the reciever, into a hole on the side of your antenna tube at least 1 inch from any conductive material....make sure none of your speed control power wires are within 3 inches of the reciever or antenna....you could also try to stand the reciever on it's side (this is the best position for getting the least interference)....I also always use the (kyosho brand vibration tape) to mount the recievers on all of my cars....or a couple pieces of thick two sided tape stacked up does about the same......at this point (unless you have something defective in your electronics) you should have increased your range and be further away from the edge of glitching....even in less than ideal surroundings.......hope this help some.......Joe B
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Old 06-13-2004, 03:44 AM   #4
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have you raced at the same track without glitching? maybe it is something to do with the computer/loop/transponders or something wierd like that?

other than that, it's got me stumped
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Old 06-13-2004, 04:37 AM   #5
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Could be that one of the people in your race had a bad transmitter, and they were causing interference.
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Old 06-13-2004, 05:02 AM   #6
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Was there by chance someone on 82 also? If so it could be third order intermodulation. With three evenly spaced channels the two lower ones can combine to create a sideband wave that effects the upper one.
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Old 06-13-2004, 05:48 AM   #7
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or somebody wasn't running the frequency he said he was... can happen to the best....

Good luck,

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Old 06-13-2004, 06:29 AM   #8
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Default Just a glitch?

Did you try twisting your battery wires and motor wires? Twisting them cancels out any RF they produce. Graphite chasis? What radio and Rx? I ASSume its FM. Sometimes I just have to move to the other end of the drivers stand and it goes away.

I agree with Joe B, you can be redy to glitch, but not happen verry often. These are the hardest to find. Moving your components also is a great way to fix things. Be sure to check the wires where they plug into the receiver. Just a little loose and...........

No power wires near your receiver or antenna.
Hope this helps
Let us know what you find.
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Old 06-13-2004, 07:40 AM   #9
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for my experience "only race glitch"
1) isn't it the same track that u always practise?
2) any changes of electrical component in yr car?
3) have u tried other motors?

1) frequncy too near may cause glitch say 75.450 and 75.455 or 75.445 will 100% cause problem
2) loose wiring (connector or soldering) will cause glitch
3) damage of end bell will cause glitch (cap./ shoky)
4) glitch at the same corner maybe some underground wire or so change christal.

Last edited by rcsabah; 06-13-2004 at 07:50 AM.
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Old 06-13-2004, 10:16 AM   #10
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"only race glitch"

Normally we look only at our things, namely car, receiver and so on, but ...
More often than we must expect the problems arises outside our equipment, that means, you could have a side by side pilot with off tuned Tx, that will enter your frequency.
When I experience this problem only with others, first I change the receiver. Than I'll try to spot who "enters" in my frequency, and normally if the "bad TX" change crystals it will enter in someone's else receiver. Then you have find the problem !!!
How to solve the problem it's already another story, because trying to explain that someone else has to tunne their Tx is ....
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Old 06-13-2004, 10:24 AM   #11
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Just a though.

Will a personal transponder or the transponder itself give problem with glitch?

I did face the same problem and after changing the transponder, all my problems was erase.
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Old 06-13-2004, 11:16 AM   #12
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I have had some trouble with transponders being next to my receiver which is the standard for the electric TC3. After I moved the transponder I never had another problem.
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Old 06-13-2004, 01:48 PM   #13
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Wow, thanks everybody I appreciate all the help.

utieh - Nope, no fan heatsink.

Joe B - In my first practice run my radio started beeping at the start, I pulled my car off after 2-3 minutes and my radio was down to 8.4v and it still hadn't glitched once. But I'll do the things you suggested. I usually only glitch if I forget to run in my motor or forget to twist my motor wires(makes sence with the about to glitch idea).

Rory - No I've been racing at the same place for a few months.

sosidge - There were a guy racing I'd never run against before, he could have ad a bad Tx.

Robertw321 - It still glitched when I tried 82 and 64.

Lonestar - I physically checked every radio.

David Root - I have to twist my motor wires or I'll glitch(definately goes along the lines of what Joe B was saying).
I'm still running an Xr2 (am) so that could be part of it. I tried both sides of the driverstand and it didn't make any difference. Also no battery wires near my antenna or rx.

rcsabah - The exact same track, same gear and there wasn't any damaged to anything.

gearless - I've been racing against the same 4-5 people for the last few weeks and havn't had any problems, yesterday there was another guy racing who I hadn't see before. If he comes again I'll check it out.

AdR|aN / kuffman - Nope, no personal transponder.
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Old 06-13-2004, 03:37 PM   #14
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Any type of transponder at all?
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Old 06-13-2004, 04:20 PM   #15
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Here all the precaution I personally take...
1.run antenna wire through a scrap piece of silicone wire jacket...
any extra wire between antenna and reciver
2.twist motor wires
3.Put ferite magnet on wire going to reciver from esc
I have used this method for a year and a half with no problems.Hope some of this helps
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