BELL SYSTEM PRACTICES
Plant Serie5
SECTION 501-211-102
lnue 3, October 1970
AT&TCo Standard
HANDSETS (AMPLIFIER)
G6, G7, GS, AND G13 TYPES
IDENTIFICATION, CONNECTIONS, AND MAINTENANCE
1.
GENERAL
1.01
This section is reissued to:
eAdd connections for G 13A and G 13B handsets
to TOUCH-TONE® coin collector/telephones.
eDelete 3.02.
e Provide additional information on connections
to rotary dial sets (3.01).
e Add information formerly contained in Section
501-211-400 which is hereby canceled.
Changes or additions in the body of tables is
indicated by shaded areas.
2.
IDENTIFICATION
2.01
These amplifier-type handsets are available
as replacement handsets for use by persons
with impaired hearing (G6- and G 13-type), weak
speech (G7-type), and persons in noisy locations
(G8-type). Table A lists these handsets and their
component parts and principal uses.
G6-Type (Impaired Hearing)
2.02
The G6-type handset is equipped with a
receiver amplifier unit. The volume control
potentiometer in the center of the handle adjusts
the loudness setting of the receiver so that the
handset may be used by persons with normal
hearing as well as persons with impaired hearing.
2.03
The G6B handset (Fig. 1) has the transistorized
amplifier and polarity guard units located
on a printed circuit board in the receiver end of
the handle. The amplifier, potentiometer assembly,
and handset cord connect to a terminal board
located in the transmitter cavity.
2.04
The G6AR
(MD)
handset (Fig. 2) consists
of a printed circuit receiver board, transmitter
board, and a potentiometer assembly mounted in
·
the handle. Internal connections are made by a
flexible circuit strip and plug-in connectors.
2.05
A single stage transistorized amplifier is
located on the receiver board and amplifies
the received signal. A polarity guard circuit,
mounted on the transmitter board, assures proper
polarity of the de voltage supplied to the amplifier.
G7-Type (Weak Speech)
2.06
The G7-type handsets are equipped with a
transistorized transmitter amplifier intended
for use by persons with weak speech. The
potentiometer in the handle controls the level of
the transmitter output.
2.07
The G7B handset has the transistorized
transmitter amplifier located on a printed
circuit board at the receiver end of the handle.
The polarity guard and one inductor are on the
amplifier terminal board. The potentiometer
assembly, and handset cord connect to a terminal
board in the transmitter cavity. Internal connections
are made by spade-tipped leads.
2.08
The G7 AR (MD) handset consists of a printed
circuit receiver board, transmitter board,
polarity guard circuit, and a potentiometer assembly
mounted in the handle. Internal connections are
made by a flexible circuit strip and plug-in connectors.
GlJ..Type (Noisy Locations)
2.09
The G8-type handset is equipped with a
transistorized receiver amplifier and a
push-to-listen switch and is intended for use in
noisy locations. The push-to-listen switch, when
operated, decreases the transmitter output and
increases the gain of the receiver amplifier.
© American Telephone and Telegraph Company,
1970
Printed in U.S.A.
Page 1
BSP S01-211-102-i03_1970-10-0l.jpg Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Mar 02, 2012 22:06:33
