driver and transistor recommendation

I need to find the appropriate analog RF power transistor driver and power transistor for an unusual application and format.  

The driver and transistor need to operate variably through the 3 MHz - 4 MHz range with a line-level sine wave input. 

The inductive load (an air core primary winding) is in series between a DC power supply (~ +20 – +30 VDC, 1.5 A maximum) and the transistor drain.  The line-level sine wave input signal feeds the driver input.  The frequency is variable through the 3 MHz – 4 MHz range from a signal function generator.  The output of the driver is connected to the transistor gate, and the transistor source is grounded.  The transistor acts as a variable ground that pulls power from the supply through the inductive load.  This arrangement is used such that there is no negative feedback acting on the inductive load:   

power supply > inductor > power transistor > ground

                                                      ^   

                                                  driver  

                                                      ^  

                                           signal generator  

I need recommendations for both the driver and the transistor itself.

Thanks,

paul