Some AC power supplies have a built in oscillator that can change the Line frequency to 60hz, 120hz, 400hz, 800hz. Can I power a circuit board that is designed for 60hz and power it up with 400hz or 800hz or power a circuit board that is designed for 115 at 400hz and use a regular power supply at 115 vac at 60hz? What would I have change in the design to power a circuit board that is designed for 115vac at 400hz to work with a power supply that is 115vac at 60hz? is there any problems or it will work?