6Q SEL 152MHZ V/O/T 28V BLK 071-01282-0043KFS 598A Control Display Unit | Black Faceplate, 151.975MHz, 28V, VOLUME/ON/OFF/TESTThe KFS 598A is the control/display unit for the KTR 908 VHF communications transceiver. The digital gas discharge display simultaneously shows readouts of active and standby..