Capacitor banks and Switching transistor.

I have built two capacitor banks. The large bank is 4470uf at 400 Volts. The smaller capacitor bank is 2730uf at 400 Volts also. I have also put a transistor on a PC Board to switch the Thrisistor at the required switching voltage

The Transistor is a RFP50N06. The transistor switches the 4 Volts @ 320 MA to the High power Thrisistor.