Two wire voice frequency intermediate repeater for use on lines with 20 or 1000-cycle signalling. Provides thru simplex telegraph operation. Uses one battery BA-40 which last for about 2 weeks.

Four wire voice frequency telephone repeater for use on wire and cable facilities with 20 or 1000-cycle signalling. Contains hybrid coil equipment for providing a two-wire termination on one side of repeater when used at a terminal or at a junction with two-wire line. With simplex telegraph operation 1000-cycle signalling required. Uses power unit PE-204 or three batteries BA-23 and four BA-36.

Portable telephone equipped with transmitting and receiving amplifier for increasing operating range. Transmission is in one direction at a time controlled by a push to talk switch in handset handle. Uses one battery BA-27, one BA-65 and three BA-2

1:1 ratio ring-thru coil for use between line and switchboard. Simplex tap provided on line winding.

Same as EE-101-( ) except only one 1000-20 cycle ringer. Replaced by EE-101-( )

Two 1000-20 cycle ringers for use where 20 cycle signalling cannot be used over line. Operation normally from 110VAC supply. Has automatic transfer from AC supply to storage batteries. One EE-101-( ) required at each end of two circuits.

Four channel carrier telephone terminal. Part of spiral four carrier system. Provides one voice and three carrier channels using frequency up to 12kc. Provides one DC signalling circuit and on DC telegraph circuit on the two simplexes. Signalling circuit used in system maintenance. One or more telephone channels may be used for voice frequency telegraph TC-2; channel 3 is the first choice. Each telephone channel requires 1000-20 cycle signalling. Has built in transmission testing equipment and automatic transfer from AC power source to storage battery. Includes 100% spare tubes, protectors, fuses and vibrator.

Four channel carrier intermediate repeater used in spiral four carrier system. Arranged for DC signalling and DC telegraph operation over the two simplexes. Has built in transmission testing equipment, talking and monitoring arrangement for the voice channel, and automatic transfer from the AC power supply to storage batteries. Includes 100% spare tubes, protectors, fuses and vibrator.

Carrier converter for use with Telephone Terminal CF-1 or repeater CF-3 to provide 4 circuits over a single open wire pair. Operation is on a equivalent four-wire basis, one direction of transmission being 0-12kc and the other direction 20,8 to 32,2 kc. Provides two composited DC telegraph path. Includes amplifying, modulating, and demodulating equipment, composite set, built-in testing equipment, and automatic transfer from AC supply to storage battery. Includes 100% spare tubes, protectors, fuses and vibrator.

Carrier repeater for use at intermediate offices on equivalent four-wire systems using Converter CF-4. Arrangement for composited telegraph. Has built in transmission testing equipment, talking and monitoring arrangement on Channel 1, and automatic transfer from the AC supply to storage batteries. Includes 100% spare tubes, protectors, fuses and vibrator.

Four wire-2 wire equipment used with the telephone terminal CF-1 and repeater CF-3 to provide 1 voice and three carrier circuits over a single pair. Operation in on a balanced two-wire basis using frequencies up to 12kc in each direction of transmission. Used principally on open wire pairs. provides two composited DC telegraph paths. Includes a repeating coil hybrid, adjustable balancing network, and a composite set. Requires no power. Includes 100% spare protectors.

Telephone for use primarily by lineman to connect to voice frequency channel on line used for carrier operation. Contains EE-8 telephone unit, also filter to prevent mutual interference between voice and carrier channels. May be used to provide an intermediate bridged station on voice or carrier lines. 

1x Telephone Terminal CF-1
1x power unit PE-75
2x Batteries BB-55
1x Rectifier RA-83
1x Test Equipment IE-53
1x Tool Equipment TE-123
1x Telephone EE-8

1x Repeater CF-3
1x power unit PE-214
2x Batteries BB-55
1x Rectifier RA-83
1x Test Equipment IE-53
1x Tool Equipment TE-123

1x Ringing equipment EE-101
2x Batteries BB-55

1x Telephone repeater EE-99
1x power unit PE-204
1x Telephone EE-8

1x Converter CF-4
2x Batteries BB-55

1x Repeater CF-4
1x power unit PE-214
2x Batteries BB-55
1x Rectifier RA-83
1x Test Equipment IE-53
1x Tool Equipment TE-123
1x Telephone EE-8

An 88 millihenry loading coil, with DC resistance of 8,4 Ohms, weight approx. 3lbs, having a waterproof phenol plastic case.
Coil C-114 is used at 1-mile interval on wire W-110-B and at 5/8 mile intervals on wire W-143 to extend talking range.

Improved version of C-114.