I finally received from HobbyKing the radio to control my quadricopter: a Turnigy 9x mode2 that also includes an 8-channels receiver:
As I wrote in the first blog post about the building of my quadricopter, Mode2 means that the left stick is the throttle. With some modifications, it it however possible to convert the radio from one Mode to the other, as explained on iFixit.
The Turnigy 9x is definitely an entry-level radio, both for its functionalities and the manufacturing… it’s greatest value is the price (about 50€), very cheap!
The transmitter is usually powered by 8 AA batteries, while the receiver is powered directly by the ESC.