| Year | 1922 |
| Date | 18-May |
| Volume | 46 |
| Issue | 1,099 |
| Page | 488 |
| Category | Radio Engineering |
| Part | |
| Title | Low-Frequency Transformers for Radio Reception |
| Author | Captain H. de A.Donisthorpe |
| Notes | Three-valve low frequency amplifier circuit showing transformers, ebonite transformer former, interior of 2M.T. the Marconi Scientific Company's station at Writtle |