Quantcast Figure 6-13.--Schematic diagram of the type G (version 2) telephone set.
 

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you press this button, the handset will be released from
circuit. This circuit serves the same function as the
its cradle.
transmission network circuit in the version 1 set.
When you remove the handset from its cradle, three
Internal Circuitry
paths for dc are provided from terminal L1 to terminal
L2. Dc path 1 is through resistor RI and varistor RV1.
Figure 6-13 is a schematic diagram of the type G
Dc path 2 is through inductor L1, resistor R2, and the
(version 2) telephone set. The circuit is designed and
transmitter. Dc path 3 is through inductors L1 and L2
operates in a slightly different manner as that of the
and varistor RV2.
version 1 set. Circuit operation will be discussed in the
The mutual inductance of inductors L1, L2, and
following paragraphs.
L3 and the value of resistor RB (resistor, balance 68
NETWORK ASSEMBLY.-- Figure 6-14 is a sim-
ohms) is such that a comfortable level of sidetone is
plified schematic diagram of the network assembly
heard in the receiver when the transmitter is excited.
Figure 6-13.--Schematic diagram of the type G (version 2) telephone set.
Figure 6-14.--Simplified schematic diagram of the network assembly circuit.

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