![](https://coimages.sciencemuseumgroup.org.uk/50/660/medium_thumbnail_1936_0583__0001_.jpg)
!['Ora' wireless receiving triode](https://coimages.sciencemuseumgroup.org.uk/52/718/small_thumbnail_1922_0732__0002_.jpg)
!['Ora' wireless receiving triode](https://coimages.sciencemuseumgroup.org.uk/52/717/small_thumbnail_1922_0732__0001_.jpg)
'Ora' wireless receiving triode, made by the Mullard Radio Valve Company, Mitcham, London, England, 1921
Details
- Category:
- Electronic Components
- Object Number:
- 1922-732
- Materials:
- glass and metal (unknown)
- Measurements:
-
overall: 100 mm x 40 mm diameter, .045 kg
- type:
- thermionic valve
- credit:
- From the Mullard Radio Valve Company