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Idiomas disponibles
Idiomas disponibles
1-1. GENERAL.
The Federal Voice Gun (Models A12SA and A12*W)
electronic megaphones are designed for long, trouble-
free service and simple operation. The following should
be observed to obtain maximum results:
A.
Operating power for the electronic megaphone
is supplied by eight AA size batteries (not supplied). To
install batteries, apply slight pressure with thumb against
battery cartridge at bottom of handle. Remove locking
thumb screw (if tight, screw may be started with a thin
coin). Remove cartridge. All batteries should be placed in
position with the small copper battery tip pointing away
from the springs at the top and bottom of the cartridge.
Standard AA size alkaline batteries are recommended for
greater volume and life. Batteries equal to the following
manufacturers' types should be used:
1.
Mallory Duracell MN1500
2.
Eveready No. E91
3.
Burgess No. AL9
Do not use mercury cells. Polarity of mercury
cells is reversed and damage to the instrument
may result.
B.
The Class B amplifier draws very little current,
even with the trigger button depressed, except when
actually speaking into the microphone. This results in ex-
cellent efficiency and long battery life. In instances where
the electronic megaphone is used for short periods a few
times a week, batteries may last from six months to one
year. Batteries should be replaced at least yearly to avoid
possibly exceeding their shelf life.
Section I
General Description and Operation
1-2. OPERATION.
Your hearing and the hearing of others, close to
the electronic megaphone, could be damaged
by loud sounds. This can occur from short
exposures to very loud sounds, or from longer
exposures to moderately loud sounds. For
hearing conservation guidance, refer to federal,
state, or local recommendations. OSHA Stan-
dard 1910.95 offers guidance on "Permissible
Noise Exposure."
Operation of the electronic megaphone is very
simple. The following steps should be observed to obtain
maximum results.
A.
The electronic megaphone is operated by
simply pressing the trigger button and speaking into the
microphone. The button should be depressed only when
actually speaking.
B.
Hold the electronic megaphone with one hand.
Do not place other hand around mouthpiece. The unit
has been designed with a crisp response to increase in-
telligibility, particularly when used under noisy conditions.
If operated in a small empty room, a slight ringing sound
may be noticed.
C.
For simplicity, no external volume control is
used. Volume is controlled entirely by voice intensity. FOR
BEST RESULTS AND UNVARYING SOUND REPRODUC-
TION, LIPS SHOULD BE PLACED IN CONTACT WITH
MICROPHONE HOUSING.
D.
For maximum intelligibility and effectiveness, be
sure the open bell side of the Voice Gun is facing those
you are speaking to.
Volume is preset at the factory and normally
should not need readjustment. If and when
necessary, it can be adjusted by removing
rubber plug on horn at rear of handle and
inserting small screwdriver. Turning control
to the left decreases microphone sensitivity
and turning to the right (clockwise) increases
sensitivity. Control should be set just below
the point of feedback under existing conditions.
Rubber plugs should be reinserted, forcing it
in place with a small screwdriver.
1
NOTE
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