Originally Posted by semper
Somebody should point out that you don't need to get a transponder since the club you'd race at would have them... A 'personal' transponder would cost us$90-100 or $125-140au.
Right, before you decide to plop down the money for a personal transponder, mae sure the track you run at actually uses them(there are AMB transponder systems that predate the personal system which are not compatible with them, so even though they're made by AMB, they can't count a personal, & in that case you'd end up wasting your money). Transponders are ONLY used to help a track's computer count laps & laptimes, they serve no other purpose. Also, you do NOT have to have a 3 channel receiver to use a PT(personal transponder), you just need a "Batt" slot on the receiver(which all receivers still have, meant for nitro cars to plug in a receiver battery pack, but they can also SUPPLY voltage when you have them in electric cars). To answer your original queston, the only real difference in 2 & 3 channels radios is that a 2 ch. can only control 2 things at once(like the throttle & steering on a car), while a 3 channel can handle 3 at once(like the first 2 things plus maybe running a switch to shift a transmission or put it in reverse, like some monster trucks can do), otherwise they're identical. The real key in picking a radio is the other features they have, like control over end points, exponential, multiple model memory, synthesized or DSM frequencies, etc. Just concentrate on those things & you'll be fine. Also, if you could let us know exactly what you'll be using the radio for(racing, bashing, what kind of car, etc.), we might be able to offer some specific suggestions on radios to look at.....