![](https://coimages.sciencemuseumgroup.org.uk/30/666/large_thumbnail_1928_0945__0002_.jpg)
Spherical vacuum tube with foil electrodes on walls and spring copper contacts
- Made:
- 1891
Spherical vacuum tube with foil electrodes on walls and spring copper contacts, on stand
Details
- Category:
- Electricity and Magnetism
- Object Number:
- 1923-343
- type:
- vacuum tube
- credit:
- Institution of Electrical Engineers