| Help |
| Tube Application Notes |
| Bases and chimneys |
| Triodes |
| Tetrodes |
| Pentodes |
| Electronics and computers |
| Y799 |
| YC156 |
| Yagi-Uda |
| Amperex |
| Burle |
| Eimac |
| GEC |
| HP |
| Machlett Laboratories |
| Penta |
| Philips |
| Raytheon |
| RCA |
| Siemens |
| STC |
| Svetlana |
| Burle |
| Eimac |
| Penta |
| Thales (formally Thompson) |