Cambridge Instruments DC Range box


DC Range box for versatile galvanometer Designed to be used in conjunction with a 500 ohm Unipivot meter. The unit has a set of wire-wound resistors a current/voltage switch and two range switches. Cambridge Instrument Company Ltd, UK, date unknown.

This is one of many instruments collected by Jack Davidson C Eng FIEE which I have been given by Dr Graham Winbolt

Interior of the instrument