| Year | 1922 |
| Date | 07-Dec |
| Volume | 47 |
| Issue | 1,128 |
| Page | 558 |
| Category | Radio Engineering |
| Part | |
| Title | A Valve Circuit for High Amplification without Reaction |
| Author | Captain H. de A.Donisthorpe |
| Notes | Circuit for amplification of weak signal, characteristic curve of thermionic valve |