Show radio batteries and what each has to do batteries for operation of receiving sets are divided into three general lasses classes the A for lighting tile ola indents Ille lits of the ole tubes the B to supply the high potent fuls require dby tile he tube plate circuits and the IVI C battery for the tube grid bluses biases to prevent distortion and excessive B bat tery t er y emi A batteries may be divided further into two 4 lasses classes dry and storage biffl butteries eries the for mer Is used to supply the A current for receivers that employ the storage battery type of tubes 11 II batt batterfeld erfel are also of two classes dry and stor etor age but the to the receiver Is the same for each type MA the B eliminator Is a device used to tit convert the ordinary house lighting alternating current Into nto direct current that may be applied to the B of the receiver instead of using tile the current supplied by a B hnery B are em cm aloyed pi at A with receivers that have many tubes |