Röhrenmarken / Tube Brands noch in Arbeit / still under construction
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
| TAYLOR |
| TECTRON |
| TELETRON |
| TELEVOGAL |
| THERMATRON |
| THERMIONIC |
| TESLA |
| THORIO |
| TOSHIBA |
| TRAV LER |
| TRIAD |
| TRIPLETONE |
| TROY |
| TRUE BLUE |
| TUNG SOL |
| TUNGSRAM |
| TELEFUNKEN |
| TKD / TeKaDe |
| THORPE |
| TRIOTRON |