The requirements of a high frequency diathermy machine for clinical therapy and for studies of physiological temperature regulation in regard to (1) frequency, (2) measurement of power output, (3) range of power output, (4) efficiency and construction are discussed. To conform with the above requirements a power oscillator of 1000 kilocycles has been built capable of delivering up to 200 watts of high frequency power. A description of the apparatus is given with circuit constants and meter values which have been found useful in physiological temperature studies on animals and human subjects. With this apparatus it is possible to measure the power consumption of a subject treated with diathermy from the voltmeter and ammeter readings.

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Aided by a grant from the American Medical Association.
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© 1936 American Institute of Physics.
1936
American Institute of Physics
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