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

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.