| 38C | Vacuum Tubes Manufacturer ESTI |
| Covimag | Tubes |
| CPI Eimac | Vacuum Tubes Manufacturers, Vacuum Tube Sockets |
| CPI Eimac Division | Tubes |
| Greenstone USA | Tubes |
| JJ Electronics | Tubes, Capacitors, TubeAmplifiers |
| KR Audio | Tube Amplifiers, Tubes |
| Official website M.V.S.Z AO Svetlana | Vacuum Tubes Manufacturers, Vacuum Tubes Retailers New Tubes |
| Shuguang Electron Group Co.,Ltd. | Vacuum Tubes Manufacturer |
| Surplus Sales of Nebraska Index | Parts, Tubes |
| Svetlana Tubes | Vacuum Tubes Manufacturers |
| TAD - The Tube Amp Doctor | Tubes, Parts |
| TESLA Vršovice | Vacuum Tubes Manufacturer |
| Thales Electron Devices | Vacuum Tubes Manufacturer |
| Triton ETD | Thyratrons, Travelling wave Tubes, Amplifiers |
| Tube Amp Doctor GmbH | Tubes |
| vaic.info | Tubes |
| Western Electric® | Tubes |