OPERATION OF AUXILIARY EQUIPMENTCONTINUED
INSTALLING COMMUNICATJONS EQUIPMENTCONTINUED
Control box C-375/GRC is used to control
One whip-type antenna is used. The location
radio set and interphone amplifier. Control
box has a main control switch in front to
select radio and interphone facilities and a
spring-loaded radio transmit switch on top.
Three control boxes are used in vehicle to fur-
nish each crew member intercommunication
facilities. 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 cab
roof. Component parts of antenna are mast
base AB-15GR, consisting of a flexible stem,
a feed-through porcelain insulator and provis-
ions on bottom for connecting antenna lead-in
cable and mast sections MS-116A, MS-117A,
MS-118A, or AB-24GR. Refer to principal
components list on page 2-100 for combina-
tions with each receiver-transmitter.