this item is a radio receiving set to be used for reception of alert or warning orders and messages by antiaircraft regimental battalion, and battery headquarters, and by searchlight and automatic weapons platoons . works with SCR-543 and SCR-284 utilizes 4-freq. 2.0 to 6.0 Mc.
- TM 11-859 Radio Set SCR-593-A. War Dept. Mar. 1943. 83 p. U408.3.A13