Resonant reed frequency meter
- Made:
- 1965-1979 in United States
- manufacturer:
- James G Biddle Company
Resonant reed frequency meter for measuring alternating voltages in the range 45 to 55 Hz using a supply of 200-250V made by James G. Biddle Co. USA
Details
- Category:
- Electricity and Magnetism
- Object Number:
- 1996-242
- type:
- frequency meter
- credit:
- Science Museum. Circulation Dept.
