Instructions for use
Select an object to view from the list below. To rotate either click on the rotate icon located in the bottom right hand corner of the image or click and drag within the object window.
Section of Dover to Calais cable, 1851
Radio coherer-detector, c. 1901
Cable code key
Globe Ashtray
Crystal Detector
Baby Turtle
Grapnel
Wheatstone auto-transmitter, late 19th century
Section of deep sea cable
Undersea telegraph cables used a version of Morse code called Cablecode. Instead of long and short bursts of electricity (dots and dashes), signals of equal length but different polarity were sent from two keys mounted side by side. This meant that signalling was quicker than Morse code as both the dots and dashes were short.