| |
02-23-2011, 10:58 PM
| #1 |
| Newbie Join Date: Jan 2011 Location: Everett area
Posts: 15
|  AM Radio Problems! DO NOT REPLY WITH "Buy a 2.4Ghz radio system"!!! This is a thread for fixing or improving AM or FM radios! So here's the deal I've had AM radios for years and never really had many problems/twitches. My rustler e-revo emaxx etc NEVER had twitches unless I rubbed the antenna on some metal or something stupid. Although this radio in my crawler is angry. 5 ft and it gets the jitters, 6 more inches and it jumps around uncontrollably. I've tried everything i could think of, different crystals, longer antenna, batteries, different antenna positions, checked all the solder joints in the TX and RX. I'm stumped. Any advice? |
|  |
| Sponsored Links | |
| | |
|
02-23-2011, 11:09 PM
| #2 | |
| Rock Crawler  Join Date: Apr 2010 Location: Kelowna, B.C., Canada
Posts: 529
| Quote:
| |
|
| |
|
02-23-2011, 11:16 PM
| #3 |
| Rock Crawler Join Date: May 2009 Location: 354
Posts: 670
| BUY A 2.4 GHZ RADIO  |
|
| |
|
02-23-2011, 11:16 PM
| #4 |
| Newbie Join Date: Jan 2011 Location: Everett area
Posts: 15
|
Hmm, I suppose it could be a faulty receiver. It certainly hasn't had an easy life. Just a FYI it is a traxxas micro RX paired to a TQ3. I'll have to try a different RX. You're a funny guy  |
|
| |
|
02-24-2011, 05:21 AM
| #5 |
| Quarry Creeper Join Date: Jul 2008 Location: Erin, Ontario, CANADA
Posts: 471
|
My guess is that electrical arcing coming from the motor is causing the glitching. Do you capacitors installed on the motor? Assuming your not using a brand new motor, you should also cut the motor comm brushes and replace the brushes. Finally, try running the Rx from a separate battery pack (vs using your ESC's BEC). Narly1 |
|
| |
|
02-24-2011, 08:47 AM
| #6 | |
| I wanna be Dave Join Date: Nov 2010 Location: 07456 N. NJ USofA
Posts: 8,314
| Quote:
The older AM/FM radios were VERY sensitive to antenna length & quality. They were also horrible on picking up electrical noise. -Caps on the motor are a MUST DO! -Doing a freshening on the motor may help (do you see arcing off the comm when the motor is running?) -Try to keep the antenna away from the ESC as well as motor wires. Swapping in a different RX would be good to try. Is this a recent event, or has this always been an issue with this rig? If recent, what is different? | |
|
| |
|
02-24-2011, 11:42 AM
| #7 |
| Rock Stacker Join Date: May 2009 Location: Baton Rouge
Posts: 92
|
Sounds like the samething I am going tru. And with a traxxas TQ radio. And I tryed a few things. But I just gave up and ordered a cheapo 2.4 radio from hobbyking for $27 shipped. Will be here next week. Good luck!!!!
|
|
| |
|
02-24-2011, 12:07 PM
| #8 |
| RCC Addict Join Date: Jun 2005 Location: St. Albans
Posts: 1,441
|
try new crystals. The RX crystal can be easily damaged in a hard impact.
|
|
| |
|
02-24-2011, 12:22 PM
| #9 | |
| I wanna be Dave Join Date: Nov 2010 Location: 07456 N. NJ USofA
Posts: 8,314
| Quote:
| |
|
| |
|
02-24-2011, 02:00 PM
| #10 | |
| Quarry Creeper Join Date: Jul 2008 Location: Erin, Ontario, CANADA
Posts: 471
| Quote:
Narly1 | |
|
| |
|
02-24-2011, 02:31 PM
| #11 | |
| RCC Addict Join Date: Jun 2005 Location: St. Albans
Posts: 1,441
| Quote:
| |
|
| |
|
02-24-2011, 03:49 PM
| #12 | |
| I wanna be Dave Join Date: Nov 2010 Location: 07456 N. NJ USofA
Posts: 8,314
| Quote:
 | |
|
| |
|
02-24-2011, 04:01 PM
| #13 | |
| I wanna be Dave Join Date: Nov 2010 Location: 07456 N. NJ USofA
Posts: 8,314
| Quote:
We will have to wait and see what the OP has to say.   | |
|
| |
|
02-24-2011, 04:34 PM
| #14 |
| Quarry Creeper Join Date: May 2009 Location: Under Communist Occupation
Posts: 271
|
Check the servo harness very carefully
|
|
| |
|
02-24-2011, 06:53 PM
| #15 |
| Newbie Join Date: Jan 2011 Location: Everett area
Posts: 15
|
Woah! Lots of replies, good to see! I have 1 cap on the motor (PO never installed the other 2?) almost brand new motor zero arcing. It has always been a problem with this rig. Although it has recently gotten worse when I rebuilt the whole truck. I must be due to the close placement to the esc. I'm going to due a bit of troubleshooting with a known good system tonight and get back to you guys. This receiver used to be in my brothers merv. He changed from a glitch that sent $500 straight toward a rolling tire. So I could be dealing with a lemon. If all else fails I'll just "share" ;) the 2.4 radio in another car.. Thank you for all of the suggestions! None will be overlooked. |
|
| |
|
02-24-2011, 07:06 PM
| #16 |
| Suck it up!   Join Date: Mar 2008 Location: Arkansas
Posts: 11,652
|
Why fight technology? 2.4 systems are cheap now.
|
|
| |
|
02-24-2011, 07:12 PM
| #17 | |
| I wanna be Dave Join Date: Nov 2010 Location: 07456 N. NJ USofA
Posts: 8,314
| Quote:
I have 2 Futaba Magnum Jr's....both crystal radios that work well. My 2.2 Bully rig has the Futaba 3PM-x to run a single ESC and a servo dig. I plan on buying more RX's so I can swap out ALL my RC vehicles to a single TX. | |
|
| |
|
02-24-2011, 07:42 PM
| #18 |
| Newbie Join Date: Jan 2011 Location: Everett area
Posts: 15
|
Because I can, that's about it. I couldn't agree more. I was simply trying to fix this system while helping others who may have radio problems. |
|
| |
|
02-25-2011, 06:55 AM
| #19 |
| I wanna be Dave Join Date: Nov 2010 Location: 07456 N. NJ USofA
Posts: 8,314
|
Not many running crystals anymore, especially in crawlers. People are amazed when I go carpet racing with my early 80's (?) Magnum Jr's. I bought the 3PM-x so I can ditch multiple radios, save model memories (instead of tweaking things when I change vehicles), not deal with frequency conflicts (although not much anymore, most are running 2.4ghz), etc. I happen to really like Futaba, so that is why I went 3PM-x. Good luck on your troubleshooting, hopefully it's not a bad RX. (PS, my 1st Futaba was the beige box with the trigger off the back, I still have 2 of those!  )
|
|
| |
 |
| |
Linear Mode
