| Year | 1920 |
| Date | 26-Feb |
| Volume | 42 |
| Issue | 983 |
| Page | 199 |
| Category | Electronic |
| Part | 4 |
| Title | Wireless Notes |
| Author | A.V.Ballhatchet |
| Notes | A capstan head detector, crystal detector with ball & socket adjustment, detector with universal adjustment, simple carborundum-steel detector, another arrangement of capstan head detector, resistance of carborundum, battery & potentiometer connections |