Ekco SH25 radio, 1932, restored 1973. 5-valve domestic receiver in Art Deco Bakelite case featuring large circular tuning scale around metal speaker grille depicting treescape
A five-valve domestic receiver in an Art Deco Bakelite case featuring large circular tuning scale around a metal speaker grille depicting a treescape. The SH25 was the first superheterodyne radio made by E K Cole and Co Ltd. 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 unnecessary. This made the task of tuning the radio receiver to different stations much more simple and straightforward. Radios with superheterodyne circuit technology are commonly known as ‘superhets’.
- Radio Communication
- Object Number:
- brass (copper, zinc alloy), celluloid (cellulose), copper (metal), electronic components, fibreboard, glass, phenol formaldehyde (Bakelite) and steel (metal)
- radio receiver
- component - object
- Peverett, A.
Cite this page
We encourage the use and reuse of our collection data.
Data in the title, made, maker and details fields are released under Creative Commons Zero
Descriptions and all other text content are licensed under a Creative Commons Attribution 4.0 licence
Download catalogue entry as json
View manifest in IIIF viewer
Download manifest IIIF
Our records are constantly being enhanced and improved, but please note that we cannot guarantee the accuracy of any information shown on this website.