1A.340/5 PROBE MICROPHONE AND TRANSFORMER, 1960's

Probe microphone and matching transformer, it is not known what this item may have been used for, the tip of the shaft has a diameter of 18mm, making its use for a specific task, as most probe microphones would have a much smaller diameter. This item came from the Standard Communication Laboratories, work here was for the research of telephone Telecommunications, no more is known about this item.

Donated by John Barnes

A1865