| ELECTRICAL POWER SOURCE RELATIONSHIP | OPERATING |
| ENCLOSURE FEATURE | SINGLE ITEM W/HOUSING |
| DC VOLTAGE RATING | 4.5 VOLTS MINIMUM AND 22.5 VOLTS MAXIMUM |
| FUNCTIONAL DESCRIPTION | USED AS A TONE SOURCE AND SWITCHING CENTER TO IDENTIFY CONDUCTORS AND PERFORM EXPLORING COIL TESTS ON EXCHANGE CABLES. ALSO USED AS BATTERY AND TONE SOURCE FOR WHEATSTONE BRIDGE MEASUREMENTS |
| HEIGHT | 6.500 INCHES NOMINAL |
| INTERNAL BATTERY ACCOMMODATION | INCLUDED |
| LENGTH | 9.000 INCHES NOMINAL |
| OPERATING TEST CAPABILITY | VACUUM TUBE OSCILLATOR,5OO CYCLE TONE,7 CYCLE WARBLE FREQUENCY |
| MATERIAL AND LOCATION | STEEL HOUSING |
| REFERENCE DATA AND LITERATURE | TO 33A1-8-1-121 |
| WIDTH | 8.750 INCHES NOMINAL |
| TEST TYPE FOR WHICH DESIGNED | CALLING IN SIGNALLING INDENTIFICATION OF CONDUCTORS IN A CABLE TONE TESTING |