17 Apr, 2015
29 Apr, 2015
15 Apr, 2015
An Ammeter built by Johnson & Phillips Ltd in 1903. It is not an electromagnetic instrument (with a moving coil or magnet), but a thermal type! It is based on the expansion of a...
A beautiful Bakelite thermostat probably from the early part of the 20th century. This is an early room thermostat of high accuracy and with contacts that can handle 20 A @ 250V A.C.
This ancient multimeter still works as new! It is made by Everett Edgcumbe and its weight is 6.7 kgr! Does anybody know when it was made? Αυτό το πολύμετρο δουλεύει όπως όταν ήταν καινούργιο!...