German "Birka" thermo-electric "wire-type" (no bimetal) relay in vacuum tube
This image is released under a CC BY-NC-SA 4.0 Licence
Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
LicenseGerman Birka' thermo-electric 'wire-type' (no bimetal) relay in
Science Museum Group
© The Board of Trustees of the Science Museum
German "Birka" thermo-electric "wire-type" (no bimetal) relay in vacuum tube, smallest standard size no.602
Details
- Category:
- Electricity Supply
- Object Number:
- 1932-394
- type:
- relay
- credit:
- Birka Regulator Co.
