| Year | 1922 |
| Date | 08-Jun |
| Volume | 46 |
| Issue | 1,102 |
| Page | 558 |
| Category | Radio Engineering |
| Part | 13 |
| Title | Wireless Notes |
| Author | A.V.Ballhatchet |
| Notes | A Three-Valve Receiver and a High-Frequency Transformer. Key plan of amplifier base, wiring diagram, selection switch, the amplifier, the high-frequency transformer, connected as stepped inductance |