Home Inside Explore Local History Education and Research About

Explore our collections | Featured objects
  The Single Current Morse Key
The Double Current Morse Key
The Raymond-Barker Multi-Tone Transmitter
The ABC Telegraph
The Muirhead Transmitter
The Universal Shunt
The Relay
The Resistance Box
The Dearlove & Brown Perforator
The Interpolator
The Synchroniser
The Fork Relay
The Sounder
Bullock and Browns Unigraph
The Mirror Galvanometer
The Siphon Recorder
Welcome to the Stereoscopic Library

The Double Current Morse Key

A brass key with a round, glass-topped cover and a switch to set the key for either sending or receiving. A more sophisticated switch which always leaves a current on the cable

Whereas the Single Current design only put a current on the line when the key was pressed, the Double Current design incorporated a permanent line current.
 
How it worked
When the key was pressed it reversed the polarity of the line current until the key was released again.

Click here to try Morse Code yourself.
 

Home | Site Map
News | Exhibitions & Events | Shop | Visit Us | Museum Hire
Support us | About the PK Trust | Contact Us | Sponsors