The solid state relays completely eliminated the switching noise!!!! One little glitch remains. When I was wiring up the SS relays on the bench, they were closed. A bit of research revealed that they need a resistance load before they will open. I hooked up the motors and everything worked. The issue seems to be that the low motor, when it gets up to full speed drops resistance below the relay threshold and it cuts out and stops spinning. I will experiment with adding a resistor in parallel with the low motor to see if that will keep it spinning.