SIGNAL CIRCUIT CONNECTIONS FOR TT-76(*)IGGC.

TM 11-5815-238-20

2-10. SIGNAL CIRCUIT CONNECTIONS FOR TT-76(*)IGGC.

Teletypewriter Set ANIGGC-3(*) or Teletypewriter Reperforator-Transmitter TT-76(*)IGGC provides dc current for

operation of internal local circuits ONLY. Current for external signal line circuits must be supplied by a telegraph

switchboard, line unit, Telegraph Terminal TH-5/TG or other external source.

Signal circuits within reperforator-transmitter are controlled by SELECTOR switch located to right of keyboard. Signal

circuits of transmitter-distributor, keyboard-transmitter and reperforator are terminated in standard 2-conductor jack

plugs. This permits reperforator-transmitter to operate in various sending and receiving combinations.

Wiring Options

NEUTRAL OPERATION: For TT-76/GGC, the selector magnet is wired for 20-mA neutral operation when

reperforator is delivered by manufacturer. Wiring options for both 20mA and 60-mA neutral operation of selector

magnet are shown in figure below.

For TT-76A, B, CIGGC, set SIGNAL/BIAS switch on power supply and terminal unit to 20-MAor 60-MA position,

whichever is applicable. Insert plug from selector magnet cable into 20-MA or 60-MA socket, whichever is applicable.

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