BVWS Bulletin Volume 14 Supplement (December 1989)
| Page | Title | Summary/Notes |
|---|---|---|
| 1 | Metropolitan-Vickers 1922-1928. Alan Douglas |
An history of and sets manufactured by one of the major wireless manufacturers of the 1920s. |
| 7 | A Review of Early Television in the U.K. Pat Leggatt |
Television developments from mechanical through to electronic designs. |
| 12 | The Valve: Industrial Aspects Before 1925. S.Wood |
Early valves primarily intended for industrial use, including high power transmitting valves. |
| 18 | deForest: Inventor of the Triode. Bruce D.Roloson |
Lee deForest and the development of the Audion valve. |