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Old 04-15-2012, 09:18 PM   #1
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Default Does anyone still run FM on their radios?

I've been haviing some problems with my 2.4ghz radio lately unbinding. Don't know what is causing the problem but I think it might have something to do with its algorithym for collision avoidance with others.

With that in mind, maybe I should go back to FM since hardly anyone runs it anymore. Anyone else have the same experience with 2.4ghz and have gone back to FM with any success?
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Old 04-15-2012, 11:02 PM   #2
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I had the spectrum in my M8 but then came the very strange problems so I change it to the 40 mhz. I found an used m11 with 27 mhz module for arround 65usd including 2 recivings and lipo batt.
No problem so far.
Wy change to 2.4 when everyone have them now.
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Old 04-15-2012, 11:37 PM   #3
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I never stopped using 27MHz FM. The only real problem is people complaining about the antenna. Although sometimes newbies with old gear turn up and because nobody is checking a frequency board and is just turning their radio on in the pits they think they can too. So, you have to be mindful of new people.

I was at a National Title 2 weeks ago, and someone in the next field had a toy RC car with a frequency radio. The Race Director had to run 100 m to talk to them before we could start the race. Everyone was waiting because of me basically. People were slightly annoyed until I pointed out that they didn't want me to glitch right into the side of them.

This type of thing is pretty rare though. Most of the time I yell out a frequency, look at the stand, don't see any antennas and then switch the car on.
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Old 04-16-2012, 02:48 AM   #4
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I went spektrum, hated the feel of it, went back to FM and love it.
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Old 04-16-2012, 02:56 AM   #5
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I do see lots of the kids at my club with the cheap 2.4Ghz radios after being told it's the thing to have, only to have more problems and hassle compared to the basic radios they upgraded from.

I have stuck with FM as I never had any problems with it. For years I have been using FM radios, using PCM in my race cars, and never had a glitch. Even snapped the receiver aerial in an accident and ran the whole meeting with an aerial an inch long with no interference or glitching, only noticed it at home while preparing for next weeks racing.

With everyone running 2.4GHz it usually means the one big disadvantage of FM, clashing frequencies, has been removed. I know those of us at my club still running FM have all now got their own frequency. Brushless motors have also removed the biggest cause of interference for FM as well.

I do recall at a big meeting a few of the top drivers were switching back to FM as the number of 2.4 radios and amount of local interference meant FM was much more responsive. Considering how many wireless gadgets these days are also operating on 2.4GHz it could only get worse.
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Old 04-16-2012, 03:21 AM   #6
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I have a 2.4Gz Spectrum radio that I use as my #1 set but I still have a Futaba 3PM on 27mHz FM that works perfectly fine.
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Old 04-16-2012, 03:35 AM   #7
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Still run FM. 100% reliable and I haven't had to change crystals for years now. No reason to change.
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Old 04-16-2012, 05:15 AM   #8
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FM cant last forever, after a few years ususally the receiver gives way. i sold my MX3 FM to my friend cheap and he is still using it today. the only disadvantages with FM is the possibility of glitch, and the long aerial, plus it uses more battery. i have been using a MX-3 2.4G for 2 years now and have yet to face ANY problems at all . It also uses only 4 AA cells, so the transmitter is lighter. I also use a flysky 2.4G which is a ultracheapo radio for my EP buggy, and i also have yet to encounter ANY glitching or loss of control. 2.4 is the way to go. just avoid KO proppo becuase i heard bad things about their 2.4s. Airtronics are great.
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Old 04-16-2012, 05:46 AM   #9
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my son still uses fm on his helios at our local track always has. prob wont ever change it.
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Old 04-16-2012, 05:55 AM   #10
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Originally Posted by wingracer View Post
I went spektrum, hated the feel of it, went back to FM and love it.
Can you elaborate on this?
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Old 04-16-2012, 05:57 AM   #11
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Im was using a spektrum 2.4 DX3R, but had nothing but problems with Spektrum stuff, unbinding, lost signal for my boats many times. Wont buy spektrum stuff again.

I had a Airtronics m11 2.4 and never had a problem.

Right now Im using a Futaba 3pks on FM, and havent had a problem yet. Everyone uses 2.4 now so the chances of interferance are slim to none.
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Old 04-16-2012, 05:58 AM   #12
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Originally Posted by JamesL_71 View Post
Can you elaborate on this?
I tried a high end fm set because it was cheaper than getting a basic 2.4 and loved it way more than my spektrum. It felt to have a lower latency and had higher response.
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Old 04-16-2012, 06:13 AM   #13
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My son also uses a Sanwa MX3 FM radio without problem.
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Old 04-16-2012, 06:38 AM   #14
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Proud member of Team FM, people just give me thier old FM stuff,and if somebody shows up using FM stuff it like an instant friendship. 2.4 recievers are smaller though but doesnt really effect that much.
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Old 04-16-2012, 08:13 AM   #15
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Originally Posted by alcyon View Post
avoid KO proppo becuase i heard bad things about their 2.4s. Airtronics are great.
Haha, my radio is KO which has been giving me problems. I have an Airtronics M11 that sat because I mainly used the KO. It was good at first but I've had some problems glitching and now unbinding. I have plenty of 27mhz FM crystals for my M11 so I guess I'll switch back to Airtronics.

Just in case I want to stick with 2.4ghz, is the M11x noticeably more responsive than the M11 with the 2.4ghz Fasst module?
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