I know you're going to tell me to buy a multimeter, but for now, can you explain the operation of the potentiometer? I know it spins continuously but does voltage keep going up with multiple turns? Or is the voltage range found in a complete 360 degree turn? I had turned it counter clockwise by half a turn, but now it's running so hot (100mhz) that I can't touch it all at. Is there a way I can set it to the minimum voltage and work my way up?