| Year | 1922 |
| Date | 19-Jan |
| Volume | 46 |
| Issue | 1,082 |
| Page | 67 |
| Category | Radio Engineering |
| Part | |
| Title | Thermionic Valve Circuits |
| Author | Captain H. de A.Donisthorpe |
| Notes | The Marconi high power station at Carnarvon, the valve panel, the Marconi four-electrode valve, a single valve circuit |