Tubes / semiconductors by category - Manufacturer
Selected: Roytron (tubes) - see also Triad Television & Mfg. Co.; Pawtucket, RI
| Name | Maker | Year | User | Usage | Type | Base |  |
 |
 |
 |
 |
 |
 |
 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2B7 | Common typ | Radio/TV-r | Universal | Double D | 7-Pin-B | 1 | 36 | 5 | 1 | 2 | 4 | 396 | ||
| 112A | Common typ | 1927 | Radio/TV-r | Power/Out | Triode, | UX-Base | 1 | 11 | 2 | 1 | 2 | F | – | 71 |
| 280 | Common typ | 1927 | Radio/TV-r | Power-sup | Full-Wav | UX-Base | 2 | 24 | 1 | 1 | 2 | F | 2 | 1028 |
3 tubes or semiconductors found.