Válvulas por Categoría - Fabricante
Selección: HMV (Brand), His Masters Voice, The Gramophone Company Ltd.; Middlesex
| Nombre | Fabricante | Año | Usuario | Uso | Tipo | Base |  |
 |
 |
 |
 |
 |
 |
 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| S33_HMV | HMV (Brand | Radio/TV-r | Power/Out | Triode, | Europe | 1 | – | – | – | – | – | – | ||
| S34_HMV | HMV (Brand | Radio/TV-r | Power/Out | Triode, | Europe | 1 | – | – | – | – | – | – | ||
| S70 | HMV (Brand | Radio/TV-r | Power-sup | Full-Wav | Europe | – | – | – | – | – | – | – | ||
3 válvulas encontradas.