The wide range oscillator, with frequency range from 50 kHz to 50 MHz. delivers current to a resistance R h having a value of 0.02 2. This shunt resistance introduces almost no resistance into the tank circuit and therefore represents a voltage source of a magnitude e with a small internal resistance. The voltage across the shunt is measured with a thermocouple meter. The Ons is voltage across the capacitor is measured by an electronic voltmeter corresponding to Ec and calibrated directly to read Q The oscillator energy is coupled to the tank circuit. The circuit is tuned to resonance by varying C until the electronic voltmeter reads the maximum value The resonance output voltage E, corresponding to Ee, is E that is Ele. Since e is known, the electronic voltmeter can be calibrated to read Q directly. The inductance of the coil can be determined by connecting it to the test