TM 9-2350-238-10OPERATION OF AUXILIARY EQUIPMENT–CONTINUEDINSTALLING COMMUNICATJONS EQUIPMENT–CONTINUEDControl box C-375/GRC is used to controlOne whip-type antenna is used. The locationradio set and interphone amplifier. Controlbox has a main control switch in front toselect radio and interphone facilities and aspring-loaded radio transmit switch on top.Three control boxes are used in vehicle to fur-nish each crew member intercommunicationfacilities. Cables with pin-and-socket connect-ors connect control boxes in cab to a pin-and-socket receptacle in hull.of antenna “hole opening is at left rear of cabroof. Component parts of antenna are mastbase AB-15GR, consisting of a flexible stem,a feed-through porcelain insulator and provis-ions on bottom for connecting antenna lead-incable and mast sections MS-116A, MS-117A,MS-118A, or AB-24GR. Refer to principalcomponents list on page 2-100 for combina-tions with each receiver-transmitter.2-102
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