BTH Type C Crystal Set Radio Receiver

BTH Type c crystal set radio receiver

Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

Buy this image as a print 

Buy

License this image for commercial use at Science and Society Picture Library

License

BTH Type c crystal set radio receiver
Science Museum Group
© The Board of Trustees of the Science Museum

Crystal set made in 1922, has a twin crystal but only used one crystal at a time.

The crystal set was a simple radio receiver which did not need any power to make it work. It only received AM, amplitude modulated, signals. The crystal, with a point contact, called a cats whisker as that was what was sometimes used, on its surface, created a diode action rectifying the carrier wave so making it possible to hear the audio signal which was modulated onto it.

Details

Category:
Television
Collection:
BBC Heritage Collection
Object Number:
2012-5118/894
Measurements:
overall: 200 mm x 290 mm x 150 mm, 3 kg
type:
bth type c crystal set radio receiver