Audion thermionic triode valve
- Made:
- 1906 in United States
- maker:
- Lee De
Audion thermionic triode valve by De Forest
One of the first valves to have a grid
Details
- Category:
- Radio Communication
- Object Number:
- Y7001.601
- Materials:
- glass and metal (unknown)
- Measurements:
-
overall: 102 mm 23 mm,
- type:
- thermionic valve and triode valve
