A component of a medium-wave diathermy treatment system that generates electromagnetic (EM) energy, in the radio-frequency (RF) bands of 0.5 megahertz (MHz) to 1 MHz, applied transcutaneously to provide a deep heat within specific volumes of a patient's body. The energy generated by this device is typically conducted through a hand-operated electrode moved across the treatment area to treat pain, muscle spasms, and joint contractures.