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TM-11-5815-206-12 Teletypewriter Sets AN/PGC-1 AND AN/PGC-3 and Teletypewriters TT-4A/TG TT-4B/TG TT-4C/TG TT-335/TG TT-537/G TT-698/TG Manual
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Adjusting Motor Speed (Not Applicable on TT-335/TG and TT-537/G)
TM 11-5815-206-12/ TO 31W4-2PGC1-61
f. Keyboard Lock.  If messages
are to be
transmitted from the teletypewriter,
loosen the
locknut (fig. 2-5), slide the keyboard
lock toward
the front of the teletypewriter, and
tighten the
locknut.
2-7. Motor Power and Protective Ground
Connections
a.  Motor  Power  Connection.  Connect  the  TT-
4(*)TG motor power cord {fig. 1-10) to a source of
1 0 5 - to 125-volt dc or ac (50- to 60-Hz single-
phase) power  Connect the  motor power cord of the
TT-335T/TG to  a source of 108- to 132-volt, 396- to
404 cps. single phase, ac power Connect the motor
1-7)  of  the  TT-537/G  to  the
p o w e r cable fig.
mating connector on the  computer  source  of  105-
to 125-volt, 396- to 404-cps. single-phase,
(para 2-3c). Connect the power cord of the TT-
698(*)/TG
(fig.  1-10) to a source of 105- to 125-
volt ac (50- to 60Hz, single-phase) power.
Figure 2-3. Platen lock (TT-537/G).
b. Protective Ground Connection. Connect the
braided metal pigtail on the plug of the motor
d.  Carriage  Lock,  (TT-4(*)/TG,  TT-335/TG  and
power cord to a suitable ground connection point
TT-698(*)/TG (fig. 1-9). The carriage lock is used
( (1) and (2) below).
to lock the type-bar carriage in the extreme left-
(1) When installing the teletypewriter in an
hand position during transporation. To unfasten
aircraft or on a vessel, connect the pigtail to a
the carriage lock, loosen the wingnut on the left-
metal structural member of the aircraft or vessel.
hand end of the carriage rail, turn the lock until it
(2) If the teletypewriter is to be installed at a
hangs downward from the rail, and tighten the
ground communication site, connect the pigtail to
wingnut.
a water pipe or other similar low-resistance ground
e. Carriage  Lock
(TT-537/G)
(5 or 6 feet ground rod). Use a length of field wire
carriage lock is used to lock the type bar carriage
or any available wire of equal or heavier gage. If a
in the extreme left-hand position during trans-
suitable ground connection point is not available,
portation. To unfasten the carriage lock, open the
u s e one or more ground rods to obtain a low-
access window and reach under the left side of
resistance ground connection point, The ground
the access opening to disengage the carriage lock.
rod (or rods) may be located as far as 1,000 yards
Push the carriage lock lever of the rear to unlock
from the teletypewriter. Select a low. damp site,
the carriage. Close the access window.
preferably a spot where the soil is clay or loamy.
Figure 2-4. Carriage lock (TT-537/G)
2-5

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