View Full Version : Radio Help

07-02-2000, 11:50 AM
Ok ... now that I have decided on the RC10 - GT , I ran flat into a wall http://www.rccaraction.com/ubb/smile.gif

$ 200 -$ 300 for a radio ? < gasp > That is almost the cost of the car !

Is there just a plain old transmitter that will give me good controll and great distance ?

I have an old Futaba FP - T2P Magnum Sport that would fritz out on me when the car got more than 30ft away ... boy did it hurt to watch my car take a hard left into a curb at 20mph lol . ( I needed a break from RC after that one ) I must admit that I am not even sure if it was the controller that caused it but I am taking no chances this time around .

Nothing fancy just stable .

BTW : Are there any issues of Car Action or websites that review equipment like this ?

Thank you all for your help . I ' d be lost w / out it ! http://www.rccaraction.com/ubb/smile.gif

- David R .

[This message has been edited by Paradigm (edited 07-02-2000).]

07-02-2000, 02:57 PM
You can pick up a JR xr3 , 3 ch . fm , for around $ 150 . For the price it ' s hard to beat

B3 Bomb
07-03-2000, 02:48 PM
JR XR3 I just bought one and I love it . It is by far the simpilest to set up . But even the XR2 is good it has a one model memory and it is am still awesome ! My XR3 cost about $ 160 . And If I were you I would stay away from the Hitec 3D you need expensive modules instead of crystals . http://www.rccaraction.com/ubb/smile.gif

R/C It's not a hobby

R/C more

07-03-2000, 04:15 PM
And the 3D is like $ 200 bones !

Grant Tokumi
07-03-2000, 04:18 PM
A Futaba servo will not fit directly into a JR receiver . The 3 wires line up correctly , however , the Futaba servo has a little tab that sticks out on one of the sides . You ' ll either have to change the servo connector to a JR one or shave off that little tab . Then it will fit into the JR receiver . If you decide to shave the tab off , beware , the will now be able to be plugged in backwards . Servos and / or receivers might not like being plugged in backwards and you may ruin one of both of them by doing so .

Grant Tokumi
R/C Archive

07-03-2000, 08:04 PM
Hitec makes good servos and you can get them with JR connecters
$ 40 for a servo with 90oz at 6v
this is model 605 ultra torque
you can get metal gears or ball bearing their site is hitecrcd . com
I think .

07-04-2000, 12:00 AM
Thanks ! The JR XR3 looks like a very nice radio http://www.rccaraction.com/ubb/smile.gif

I noticed that the servos that come with it are not strong enough for off road nitro ... is the JR XR3 compatible with the Futaba servos ? ( or any company for that matter )

Thanks again for pointing the JR out ... it definatley looks nice http://www.rccaraction.com/ubb/smile.gif

- David R .

07-04-2000, 12:09 AM
I ' m kind of new to this , so I ' m not sure about the servos . I guess it would just depend on if the plug would physicaly plug into the receiver . I would think you could get them to work .

07-04-2000, 12:33 AM
How about Hitec Lynx 3D computer radio ?

07-04-2000, 01:09 PM
I am still not sure about servo compatability ... check this site out :

http :// rcvehicles . about . com

Then go to : RC Info center -> Equipment Info HQ -> How Servos Work

Summary : Different servo manufacturers requirer different pulse - widths ( codes ) that correspond to each position in the servos 180 degree range .

Now here is the list of radios that I have been considering for nitro off road ( w / out reguarding servo compatability so far ) :

Airtronics M8
Futaba 3PDF

The JR XR3 seems to be a great value ( though I can ' t find much info about it on the web ) but what about the servos ?? Unless I know about this I am feeling more comfortable with the Futaba ... tower hobbies has a great selection of their servos ( The S9303 looks perfect ).

The one thing I have no clue about is MODULES ! What is the difference between them and crystals ?

- David R .

07-05-2000, 01:38 AM
goto www . jrradios . com / that should help on the info part .

07-05-2000, 10:25 PM
I own JR Xr3 and JR R756 they both are awsome but I advise JR Xr3
that is if you dont want burn a nasty whole in your pocket

07-06-2000, 12:06 AM
I love the M8 . It is easy to use and very high tech . It might be on the steep side . But if you really plan to get into the hobby and race the M8 is the best choice . But for backyard bashing the JR XR - 3 and the Futaba 3Pdfs are great choices as is the M8 .


07-06-2000, 02:17 PM
ok . I have a good idea on the radios now ( One part down < cheer !>). What about the servo compatability though ?

I think I am going to post a plea for someone at RCCA to help clear that one up ...

Off to the RCCA Forum I go http://www.rccaraction.com/ubb/smile.gif

07-06-2000, 02:50 PM
The JR radio is a great radio for the price . As for the comment " It ' s the price of a car ", well the radio will be with you much longer than most car kits . Also , if you get the right radio that can have more than 1 model you can use it in a variety of cars .

About servo ' s - now that Airtronics has gone " Z " connector all servo ' s have the same wire scheme . Futaba servo ' s will work with JR , you can shave the plug to fit . There is no worry about plugging them in backwards because you are not reversing polarity ' s of +/-. If you look at the plug in any of the standard servo ' s if you plug the servo in backwards it puts the " hot " wires into the signal wire , which cannot cause any real damage . The problem comes when you use any older Airtronics equipment that have the red and black wires switched . If you plug in an old servo that the wires have been changed then you will blow stuff out . Pay attention and there should be no troubles .


Nicks $700.00 Pede
07-07-2000, 02:16 PM
Hey i have a pede with stock radio which is traxxas tq and my tlo1 has a Airtronics Rival 2 Sport is is a 42 - 52 $ radio its cheap and has throttle and servo trims tells you when the battery is low and has long range i drove my car from my house to my grandmas 2 blocks away then i couldnt see it . but when i found it it was in da ditch !!!!

07-07-2000, 07:58 PM
I don ' t want to take any chances with an AM radio though ... my last car got trashed when some RF caused it to take a hard left into a curb . That is not somthing I would like to see happen with a RC10GT going 30mph http://www.rccaraction.com/ubb/smile.gif

Nicks $700.00 Pede
07-07-2000, 10:56 PM
I thought rv2p is fm .... mysterious , Nick :>)


Nicks $700.00 Pede
07-07-2000, 11:04 PM
Your right it is am i didnt think so but also airtronics has the cx2p fm w / 2servos for 159 . 99 from tower hobbies sorry , Nick :>)


07-07-2000, 11:17 PM
I was going to say wow ... a fm radio for $ 52 . That would be great ! http://www.rccaraction.com/ubb/smile.gif

Nicks $700.00 Pede
07-07-2000, 11:19 PM
i wish , Nick :>)


08-07-2000, 03:12 AM
the futaba magnnum JR FM is good.

very low budget racer
08-07-2000, 03:17 PM
go to ahc1931.com they have a airtronics cs2p fm radio for !!!100 bucks!!! great price for this radio and if you use futaba servos on a jr hitech or airtroncs z reciever u have to cut the futaba plug from a
[===]_ to a /===\ sorry i couldnt make the pics better, so shave off the plastic piece sticking out and shave the top corners otherwize the plug wont fit or get stuck in the reciever