Radio's

Old 06-06-2007, 07:58 PM
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I have a traxxas RTR and want to upgrade my radio/reciever.

I am planning on doing some racing. I want a radio thats rechargable, 2 channel.
Whats the difference between AM and FM?
Should I go spektrum?
Any brands or model recommendations?

Thanks all!
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Old 06-07-2007, 01:37 AM
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you may want to invest in a good radio especially with you planning on racing. spectrum would be a good investment, no need for frequency checks at your tracks, no glitches with rechargeable batts.
check out spektrum site for their models...
Spektrum DX3R is very tempting...
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Old 06-07-2007, 01:52 AM
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In any case definitely go with FM or the spectrum. AM might just cause you runaways glitches and headaches. If you dont want to invest in one of those high end radios like the Futaba 3pk, Airtronics M11,or the Ko Propo Helios there are many other cheaper options from futaba, Jr, and some other brands.

I just use rechargeable AA bats instead of the ready made packs. I use ko propo helios cause I think it has the best balance, but its all really based on preference. many could say the same about the other radios too.
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Old 06-07-2007, 07:00 PM
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Well, i think its down to a lower end FM JR or futaba (about $90 for the setup) or else go to the spektrum DX2.0 for about 170.

Is there any reason i would ever need 3 channels?
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Old 06-07-2007, 09:38 PM
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I run a Airtronics M8 with Spektrum module and receiver. I love it and recommend the setup to others. The downfall it is expensive, but worth it if you plan on racing.
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Old 06-07-2007, 10:35 PM
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the 3rd channel is where you plug in your personal transponder. Others use it to actuate lights or NOS haha.
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Old 06-07-2007, 11:05 PM
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Originally Posted by agarberg
Well, i think its down to a lower end FM JR or futaba (about $90 for the setup) or else go to the spektrum DX2.0 for about 170.

Is there any reason i would ever need 3 channels?
FYI....I'm selling this one if your intrested. Futaba 3PJS
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Old 06-08-2007, 01:46 PM
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BEST BANG FOR THE BUCK!

FUTABA
3PM-FM
3PM-2.4GHz FASST System


Both great go with crystals to save the most money or FASST for zero channel conflicts for a little bit more cash
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Old 06-08-2007, 09:26 PM
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Ahhh....so whats why there are so many 3ch's...
If the reciever is 3ch but the transmitter is not it will still power the transponder then? I was wondering why i see so many 2ch tx w/ a 3ch rx....i guess thats probably why.
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Old 06-09-2007, 05:45 AM
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most if not all FM trasnmitters are 3 channel..

But either way your transponder will be powered up
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Old 06-11-2007, 06:28 PM
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I personally prefer the MX3S. The synthesized radio allows for easier transitions to new frequencies (very helpful when racing at a packed track), while stilling costing less (I think) than spectrum. Also, the MX3S has a lot of features that other radios (though not all) lack.
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Old 06-12-2007, 07:45 PM
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well, i went with the DX 2.0 Spektrum.

anyways, i have a 6v 1200mah battery pack for my car now and am charging it with a cheapy wall charger w/ 100ma and only has a red light to tell its charging.
I have no clue how long to charge it for or to know how much it is charged. Any time on how long a charge takes or how to know how much juice is left? Can i use a voltmeter to check?
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Old 06-13-2007, 03:41 AM
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Originally Posted by agarberg
well, i went with the DX 2.0 Spektrum.

anyways, i have a 6v 1200mah battery pack for my car now and am charging it with a cheapy wall charger w/ 100ma and only has a red light to tell its charging.
I have no clue how long to charge it for or to know how much it is charged. Any time on how long a charge takes or how to know how much juice is left? Can i use a voltmeter to check?

1200mah wow your not going to be see much power or run time out of that thing..

Your wall charger puts out 100mah per hour and your pack is 1200mah so expect it to take about 12-14hours to fully charge. You should really be looking into a peak detection charger. That pack would charge in about 12minutes at 6amp charge rate
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Old 06-13-2007, 04:24 AM
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the battery is only for the reciever and servo's...its a nitro vehicle...

but thanks for the info. i charged it up all last night and some yesterday so it should be good to go
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Old 06-21-2007, 05:05 AM
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is it better to have synthesised???
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