| Description | The W77 is a miniature variable μ pentode designed to operate at HF. This suggests radio frequency amplifiers as well as intermediate frequency amplifiers. |
| Manufacturer | |
| Country of Origin | England |
| Introduction Year | 1949 |
| Description | The W77 is a miniature variable μ pentode designed to operate at HF. This suggests radio frequency amplifiers as well as intermediate frequency amplifiers. |
| Manufacturer | |
| Country of Origin | England |
| Introduction Year | 1949 |
X79