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3q(7)
NAVSHIPS 91047
GE \'ERAL
DESCRIPT!ON
Figure l-ll.
Jqck Pqnel AN Type J-237/G, FrontView With One Connector AN Type UG-294/U Removed
which mounts orl the front of the cabinet, containing
eleven RF Connectors AN Typ" UG-294/U. The front
or panel ends mate with Navy Typ" -49I2LA patchcord
plugs and are used to patch multicoupler or miscellaneous
sources to the input lines of the station
receivers through Jack Panel AN Typ" I-239/G. The
rear ends mate with Navv Typ" -49190 connectors and
erternal cable from multicoupler outputs or miscellaneou
s sources.
(8) CONTROL AN TYPE C-143/G (figure
1-12).-Control AN T.rzpe C-443/G is the connecting
link betvr,'een the Signal Distribution Unit and the AF
output from two radio receivers at each operator's position
within the station, or any remote position included
in the Distribution Systern. This component which is
ciesigned for mountitrg under the front edge of a
Standard Navy Operator's Table (see figure 2-34) consists
essentially of a three position rotary selector
switch used for selection of either or both receiver outputs
to the operator's phones, a set of toggle switches
for connecting the receiver audio circuits to the Distribution
[-init, and four pairs of phone jacks for the
operator's headset connections. The operator's headset
is normally connected to the set of jacks designated
"SEL" which permits either or both receiver
outptrts to be impressed on the phones by the action of
the three position rotary selector switch. The set of
jacks designated "lJ" may be connected from a utility
line to the operator's position. The jacks marked Receiver
" ^" and Receiver "8" are coltnected in parallel
with the receiver outputs and are used to connect the
operator's headset to each receiver without the use of
the selector switch. The construction of all jacks is
such that headsets equipped with Navy Typ" -49109
single plugs are inserted in the left hand jack, and
those equipped with Navy Typ" -49L242 twin plugs
are inserted in both jacks.
The toggle switches connect the receiver outputs to
the audio lines between Control AN Typ" C-443/C
and the Receiver Otrtput Terminal Boards AN Typ"
I-242/G. With the switches open, the operator has
the receiver outputs available at his phoues, and the
selector switch permits either or both receiver outputs
to be heard.
(9) TERMINAL BOARD ASSEMBLY AN TYPE
I-242/ G ( F'igure 1-13 ).-Terminal Board Assembly
RESTRICTED
AN Typ" I-242/G consists of a size B p,tr^e . on the rear
of which four barrier typ" terminal boards mount.
Each is equipped with thirteen double screw type terminals.
The terminal boards are offset from the panel
by brackets to allow space for the connecting internal
AF cables, which are fabricated from modified TTRS
series cable. Terminal designation strips are numbered
consecutively in pairs from 1-13 inclusive on the
two top terminal boards and 14-26 inclusive on the
two bottom terminal boards. For a description of the
wiring, refer to paragraph L, lL (3) of section 2.
(10) JACK MOUNTING STRIP, NAVY TYPE
-491394 ( Fi,gure 1-14) .-The Jack Mounting Strip
Navy Typ" -491394 is a size A panel which includes
mountitrg for 52 Telephone Jacks, Navy Typ" -491395,
arranged in two rows of 26 jacks each. Wiring, which
is installed by the installation activity, is so connected
that horizontally adjacent pairs connect to the two
sides of a single circuit. Only the tips of the twin plug
patchcords make connection. The vertically adjacent
iacks are connected in parallel in such a fashion that
when a patchcord is inserted into the top pair, the
norrnal circuit to the load is broken and a new connection
substituted; but when a patchcord plug is inserted
into the bottom jacks., the normal circuit is unaltered
and the patchcord is then in parallel. Thus, a total of
13 circuits may be connected into any one lack Mounting
Strip.
Figure lr-12. Control AN Type C'443/G, Frcnl' View
QRIGINAT