A novel alternating-current voltmeter

R. S. Glasgow: The alternating-current voltmeter described by Mr. Wilson will be quite valuable in a large number of radio-frequency measurements. Particularly in the investigation of radio-frequency amplifier circuits is there a need of such an instrument. However, the type just described has too low a resistance to be employed in the majority of such circuits, as the radio-frequency current in the output circuit of the average vacuum tube amplifier is seldom more than a few milliamperes.