Battery Design Problems of the Air Cell Receiver

The present paper deals with those design features of battery-operated radio receivers which are important from the standpoint of obtaining the maximum useful battery life. The properties of the air cell A battery are discussed with relation to receiver design. The desirability of providing adequate performance until the B batteries have fallen to a very low voltage is shown. An analysis of several means of obtaining a satisfactory rate of grid voltage reduction with falling B battery voltage is included, together with a discussion of B battery resistance. It is shown that the considerations treated control a variation in useful B battery life of the order of 50 per cent.