Using a Milliammeter

Radio Record, Volume III, Issue 25, 3 January 1930, Page 30

Using a Milliammeter

O use the milliammeter to the best advantage one should know the normal current passed by each individual valve as well as the total for the whole set. It then gives to the operator the same sort of guidance about the condition of his set as a patient’s temperature gives to a doctor. There are two other extremely useful purposds 4, served by the milliammeter when used in the way mentioned. It provides an ‘infallible indication of the presence of oscillation in the detector circuit when condenser and grid leak rectification is used.