| Year | 1924 |
| Date | 12-Jun |
| Volume | 50 |
| Issue | 1,207 |
| Page | 670 |
| Category | Radio Engineering |
| Part | |
| Title | An Effective One-Valve Set |
| Author | James W.Bulman |
| Notes | Single-valve circuit with fixed grid leak, single-valve circuit with variable leak and bye-pass condensers |