| Year | 1930 |
| Date | 12-Jun |
| Volume | 62 |
| Issue | 1,518 |
| Page | 563 |
| Category | Electronic |
| Part | 3 |
| Title | The Elimination of Batteries for Wireless Reception |
| Author | W.Greenwood |
| Notes | Supply from A.C. Mains. Full wave rectification using centre tapped transformer and two separate rectifiers, using rectifying valve with two anodes, connecting grid return lead to minimise hum, full wave retification without using a transformer |