Ok.. Can I hook two transmitters on the same channel to a trainer cord without having problems ? Or do they need to be on different channels?

The radio that you use for the buddy box doesn't matter what channel it is on. So no, they don't need to be on the same frequency. The channel of the buddy box doesn't matter at all. In fact, on all of the radios that I've converted to be a buddy box I have completely removed the cyrstal. As well as the batteries, with the exception of the JR box which requires a charged battery in the buddy box to work properly.

Ken

thanks Ken.. thats what I was needing..

Just a quick question can you use a 2.4 GHz radio and buddy box it with a 72 GHz radio?

I buddy box the Futaba 2.4GHz with a Futaba 72MHz unit with no problems. One odd characteristic though, when you switch the master (the 2.4 GHz unit) over to the slave, there is a lag between the time you throw the switch and when the 72MHz unit takes over, about .5 to 1 second. Going the other way (taking control back from the slave) is instantaineous so it is not a problem but was disconcerting the first time I used the buddy box. In contact with Futaba, they said this was normal. I suspect this is also true with the Spectrum but have not tried that yet.

Spektrum will buddy box with 72 MHZ JR radios, in fact, JR makes Spectrum.

do i need to buy a spectrum to jr or can a jr to jr cord work

The cords are the same.

Ken

thanks

I recently got my transmitter changed to mode 2 from mode 1 ( throttle done ) I,ve got a Futabe cap 7 but when buddy cord is plugged in my radio now being mode 2 the buddy cord only works in mode 1 on other radio ,when I need mode 2 how do I fix this ,does the wiring on the female plug on set have to be changed if so can I do it myself

more to above post I also changed the mode via radio,s computer

For a reliable answer on this I'd suggest the Futaba support forum where you can ask Futaba reps directly. Be sure to give as many details as may be relevant.

http://www.rcuniverse.com/forum/forumid_125/tt.htm