| Year | 1995 |
| Date | 20-Jan |
| Volume | 174 |
| Issue | 3,985 |
| Page | 86 |
| Category | Workshop Electronics |
| Part | 1 |
| Title | Tachometer. A Three-Range, Hand-Held Unit |
| Author | Alan Bourne and Gordon Read |
| Notes | Introduce their design. Development work, electrical unit, mechanical unit, functional description, John Logie Baird, circuit description |