No.L-83362
Mirror galvanometer The incorporates a 6 Volt transformer, an incandescent light bulb and an optical system comprising a mirror and lens. 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
Meter movement
Although the optical system and the moving coil of the instrument were OK when I received this instrument, the very fine taut suspension wires were both broken. I have replaced these with somewhat larger wire from the hairspring of a discarded meter. It now works but will be less sensitive than intended.
