![](https://coimages.sciencemuseumgroup.org.uk/55/897/large_thumbnail_1959_0212__0001_.jpg)
Marconiphone thermionic triode valve
- maker:
- Marconiphone Company Limited
![Marconiphone thermionic triode valve](https://coimages.sciencemuseumgroup.org.uk/475/473/medium_smg00243943.jpg)
Marconiphone thermionic triode valve
MHL4
Details
- Category:
- Radio Communication
- Object Number:
- Y7001.808
- Materials:
- glass, metal (unknown) and plastic (unidentified)
- Measurements:
-
overall: 109 mm 42 mm,
- type:
- thermionic valve and triode valve