A long range wireless phasing voltmeter determines the phase difference between the time-varying voltage carried on a reference electrical conductor and another, field conductor. The voltage signal from the reference conductor is measured by a reference probe and compared by a first unit in communication with that reference probe to a 60 Hz signal generated from a GPS receiver. The phase difference, in the form of a nine-bit, audible signal using frequency shift keying to modulate the carrier frequency, is transmitted to a second unit perhaps miles away. A receiver in the second unit decodes the signal and uses another 60 Hz signal generated from another GPS receiver to re-create and then forward a surrogate of the original reference voltage signal to a meter probe that is measuring the signal on a field conductor. The meter probe can then compare the two signals to determine the phase angle difference.