Ekco 'superhet' broadcast receiver, c 1935.

Richardson, Claire

Ekco 'superhet' broadcast receiver, c 1935.
3 4 c m
40cm
actual image size: 32cm x 26cm

Description

Ekco radio receiver, type AC85, with a black Bakelite case. When combined with a wood flour filler, phenol formaldehyde, known by its trade name 'Bakelite' after its inventor, Leo Baekeland, forms a useful mouldable plastic, with very good electrical insulating properties. It was the first plastic to be used for making radios. In 1917, Edward Howard Armstrong (1890-1954) developed the superheterodyne electronic circuit, which significantly improved the sensitivity and selectivity of radio receivers over a wide range of frequencies, making amplifier tuning unnecesary. This made the task of tuning the radio receiver to different stations much more simple and straightforward.

Image Details

Artist
 
Image Ref.
 
10252569

© Science Museum / Science & Society Picture Library

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