THE FREQUENCY MEGAHERTZ SWITCH YOU HAVE TO PUSH DOWN ON IT TO GET A READING IN THE 62-113 AND 113 - 170 POSITIONS. THE FREQUENCY COUNTER READS ALL RIGHT, BUT ALSO THE RESISTANCE METER POT NEEDS TO BE CALIBRATED IT IS ABOUT 5 TO 10 UNITS OFF. SO IT WILL BE SOLD AS PARTS BECAUSE IT'S NOT WORKING CORRECTLY OR REPAIR DOES NOT COME WITH THE TRANSFORMER POWER SUPPLY SHELF 15