Hello Diver300, Thanks for your elegant solution.It's a nice idea to get the LC resonance match the driving frequency , so that the reactance of the inductor is negligible.So now the load only has copper resistance of around 8ohms so I can easily use +-30V power supply for the job.
One more thing.I want to test this system later on with wide range of frequencies, which means I need to find a voltage controlled variable capacitor which can work in the range of micro-farads.The varacator diodes which I found only works in the pico-farad range.Any suggestions.Thanks