The MT 91A Test Set contains three major components housed in
a portable plastic carrying case; the MT 147D Amplifier, the MT
723A Receiver, and the MT 513A Probe. The MT 147D is a
solid state amplifier intended to facilitate testing and fault
locating work with exploring coils and other testing apparatus
where and amplifier is required. The amplifier with the MT
513A Probe is intended for identifying wires in toll or exchange
cables without making metallic contact with conductors at a
splice or sheath opening.
The MT 147D solid state amplifier features:
Incorporates a center frequency of 540
Hz for use with both old and new detection frequencies
(500 or 577Hz)
Improved bandwidth response for
elimination of outside interference.
Increased sensitivity for better fault
Lower current consumption through the
use of integrated circuits.
60Hz filter provides high AC inductance
rejection with at least 34dB of isolation to AC
harmonics at 540 hz.
Components (included in kit or available separately):
MT-513A Inductive Probe
MT-101B Hand Exploring Coil
MT-105D Aerial Exploring Coil