A bias control circuit for a power amplifier including an RF amplifier having a transistor for power amplification, comprises two components. The saddle is connected to the air distribution header pipe with a two interlocking sections joined on one side with a hinge, and on the other with flanges. When the lifting frame is in the retracted position, the hydraulic line forms a loop which is open on top. If the computer is reactivated, it performs the instructions contained in the short message. An authorization request is transmitted to the electronic device.