c. LB operation using H-144( )/U. Make sure the H-60/PT is firmly seated in the retaining
cradle. Place the INT-EXT switch to EXT and turn the handcrank rapidly for a few turns. Wait for the
called party or the switchboard to answer. Press the PRESS-TO-TALK switch to TALK and release it
to listen. When the call is terminated, release the PRESS-TO-TALK switch and turn the handcrank
rapidly a few turns. This will signal the switchboard that the call has been completed.
12. Answering calls. When the BZ-23/PT sounds, remove the H-60/PT from the retaining cradle. For
LB or CBS operation, press the PRESS-TO-TALK switch to TALK and release it to listen. For CB
operation, it is not necessary to operate the PRESS-TO-TALK switch. When the call is terminated,
replace the H-60/PT in the retaining cradle. After LB operation, turn the handcrank rapidly a few turns
to signal the switchboard that the call has been completed.
NOTE: If using the H-144( )/U, make sure the H-60/PT is seated firmly in the retaining cradle.
When the buzzer sounds, place the INT-EXT switch to EXT. For LB or CBS operation, press
the PRESS-TO-TALK switch to answer and release it to listen. For CB operation it is not
necessary to operate the PRESS-TO-TALK switch to answer. When the call is terminated,
release the PRESS-TO-TALK switch. After CB or CBS operation operate the INT-EXT switch
to INT. After LB operation, turn the handcrank rapidly a few turns to signal the switchboard that
the call is completed.
13.
Operating under unusual conditions.
a. Extreme cold reduces battery voltage, decreases the efficiency of the transmitter and receiver,
and makes the H-60/PT and H-144( )/U cords and other rubber parts stiff and brittle. Protect the TA-
312/PT as much as possible. If the TA-312/PT must be kept outdoors in the extreme cold, install
batteries BA-3030 in place of the BA-30s, or keep an extra set of BA-30s in your pocket to keep them
warm. The extra batteries may be used to replace batteries affected by the cold. Make sure the deicing
screen is installed. Handle the TA-312/PT carefully to avoid breaking or cracking the rubber parts.
b. Hot dry climates expose the TA-312/PT to damage from dirt, dust, and the effects of strong
sunlight. Protect the TA-312/PT from these elements. Clean and dust the equipment frequently. When
the TA-312/PT is not in use, close the slide fastener to keep out dust and dirt.
c. Warm, damp climates expose the TA-312/PT to damage from fungus and moisture. Wipe
the exterior with a clean, lint-free cloth.
d. Emergency power operation. If no battery supply is available, it is possible to transmit for
approximately 4 miles by using the receiver element as a sound-powered transmitter element. Speak
directly into the receiver element, then listen while the distant party is transmitting.
1-7
SS0441
Previous Page
