Anode Bend Detection

The anode direct current versus grid bias voltage characteristic of tubes is developed in a sum i = ZAneaV, where two or three terms suffice to represent the curves of some modern commercial tubes quite accurately. This development has two practical advantages. In the first place, as is shown in the first three sections, by comparison with measured values, detection slope and distortion effects may be accurately calculated from the static tube characteristics. In the second place, some general conclusions are obtained regarding the detection of various input waves. Finally, measured and calculated values of detection gain are compared and found to check fairly well.