The vacuum tube rectifier: Oscillographic and vacuum tube voltmeter study of its application to B-voltage supply for radio receivers

This paper covers investigations made in undertaking the design of a rectifier for use as the B power supply for radio receivers. It determines the most satisfactory type of filter circuit and the appropriate values of inductance and capacitance to give a d-c. output delivered with the least practicable voltage drop and having no fluctuations of sufficient magnitude to interfere with the proper operation of the set. A vacuum-tube peak voltmeter used to detect very small fluctuations is described.