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 |
| ACTRON |
| ADVANCE |
| AIRLINE |
| AIRTRON |
| ALADDIN |
| ALLAN A |
| ALLTRON |
| ALPHA |
| AMERICA |
| AMERICAN |
| AMERTRON |
| AMPLION |
| AMPLITRON |
| ANODYNE |
| A-P TWO-IN-ONE |
| APCO TWIN |
| APEX AUDIOTRON |
| ARCHATRON |
| ARCO |
| ARCTURUS |
| ARION |
| ARMOR |
| ATAS |
| AUBURN |
| AUER |
| AUREX |
| AWA Amalgamated Wireless |
| AMREX |
| AMRAD |
| ADZAM |
| ANNAKA |
| AEG |