The signal source is a VCO that can go from 250 -400 MH. See the POS-500W+ from MiniCrcuits.com. The MOSFET is RD15HVF1 from Mitsubishi, which is capable of operating in this range:
High power and High Gain:
Pout>15W, Gp>14dB @Vdd=12.5V,f=175MHz Pout>15W, Gp>7dB @Vdd=12.5V,f=520MHz
High Efficiency: 60%typ. on VHF Band High Efficiency: 55%typ. on UHF Band
The hard part is the winding the coils, they are very small and small number of turns. I am even thinking of using a copper core (like 18 guage wire) to REDUCE the inductance, but not sure what it will do to reactance.
Richie Burnett was able to make a 4MHz solid state TC: http://www.richieburnett.co.uk/hfsstc.html
My target is 300Mhz for material morphology studies
