| Country: |
United States of America (USA) |
|
Brand: |
Common type USA |
| |
Tube type: |
Current Regulator, Urdox with FeH |
|
Tube ID = 17901
|
 |
| Identical to |
1A2
|
|
| Base |
UX-Base (4 Pins (2 thick, USA 1924, UX) (Codex=Bd)
|
| Filament |
|
| Literature |
Taschenbuch zum Röhren-Codex 1948/49
|
|
|
|
 |
|
Tabu Röhren-Codex, 1948
Anonymous 15 Collector
|
|
 |