i just rebuilt my ofna ultra mbx comp from hitting a curb i replaced the steering servo with a hiteh mg then found the curciut board in the receiver was also cracked .. i tried 3 differant futaba receivers and none worked i tried replacing crystals still nothing i hooked up a traxxas receiver and everything worked but the traxxas one is too big for the box. has any one run into this before.. oh i did try to use a radio from a truck with same resolts [sm=confused.gif]

Most likely the Radio systems were just not compatible

you can't use a positive shift Rx with a negative shift Tx and Vis-Versa,,
they both have to e the same.

Also they must be on the same band 27 or 75mhz, and AM or FM

Futaba and hitec are compatible
Airtronics only work with airtronics
The same for JR

The RTR radios are made either by Airtronics or Futaba for the most part
I think my RTR hyper7 had an Airtronics made system,

Airtronics and JR are compatible with each other and multiplex. At least in 75Mhz FM.

If you say so,
I haven't used either in quite a while,
I know years back when I flew planes they were not
I guess I've been a Futaba guy too long

This is firsthand knowledge. I have both a JR XS3 and a Airtronics MX-3.

I just replaced my Airtronics Blazer sport radio with a Futaba MS and Im still using the Airtronics receiver. Both radios are AM and both 75mhz. Both radios are junk but its working so far I havent run the car in a big open field yet but it worked well in my backyard

Pretty much anything AM will work with anything AM. It's FM that has the problems. You can also use a Futaba FM 75mhz Receiver with an Airtronics 75 Mhz radio.. I know cause I do with my M11. But you do have to use the Airtronics crystals with that.

god i love spectrum

thanx i think im going to upgrade to a jr

get the DSM if you're going to spend $$$