 Dial or ABC telegraph by Siemens & Halske circa 1850 |
 Three toy telegraphs of the dial or ABC type |
 Anglo German telegraph cable laid August 1891 |
 Baudot relay (left) and Baudot repeater (right) |
 Deprez D Arsonal galvanometer |
 Various keys |
 Elliot mirror-galvanometer used as a sensitive receiever on undersea cables |
 Four double keys, BPO (UK), Bunnell (USA), Muirhead (UK), and Ducretet (France) |
 Various sounders by Richez, Western Electric, and Menominee |
 Portable French army telegraph |
 Information booklet for passengers on ships fitted with Marconi equipment |
 The famous V24 tube by Marconi |
 Large induction coil with hammer and mercury interrupters |
 Single disk Omnigraph practice instrument |
 First radio tube (triode), made by Philips ("ideezet") |
 Tangent galvanometer by Siemens & Halske |
 First radio tube made by Siemens & Halske, model A |
 Three single-needle telegraphs mainly used by British railways |
 Tesla system (high frequency high voltage) |
 Galvanometer for use in laboratory and for field testing |
 Three telegraph bells- the left one must be wound up ! |
 Key on board sets by Bunnell (camelback key), Menominee, and British Post Office |
 Voltaic pile |
 Tape perforator for the Wheatstone high speed telegraph |