| TYPE |
|
USED AS | ||||
| VOLTS | AMPS. |
|
||||
| 1A1 | 1.0 | .50 | 2 | Ballast for 2v battery operation from 3.2v dry battery | ||
| 1B1 | 1.0 | .36 | 2.8 | Ballast for 2v battery operation from 3.2v dry battery | ||
| 1C1 | 1.0 | .745 | 1.34 | Ballast for 2v battery operation from 3.2v dry battery | ||
| 1D1 | 1.0 | .24 | 4.17 | Ballast for 2v battery operation from 3.2v dry battery | ||
| 1E1 | 1.0 | .48 | 2.1 | Ballast for 2v battery operation from 3.2v dry battery | ||
| 1G1 | 1.0 | .42 | 2.4 | Ballast for 2v battery operation from 3.2v dry battery | ||
| 1K1 | 1.0 | .55 | 1.8 | Ballast for 2v battery operation from 3.2v dry battery | ||
| 2 | 9.0 | .300 | 30 | Ballast for AD-DC filament circuits | ||
| 3 | 128.0 | .30 | 427 | Ballast for AD-DC filament circuits | ||
| 4 | 115.0 | .40 | 287.5 | Ballast for AD-DC filament circuits | ||
| 5 | 115.0 | .46 | 250 | Ballast for AD-DC filament circuits | ||
| 6 | 1.0 | .685 | 1.46 | Ballast for 2v battery operation from 3.2v dry battery | ||
| 7 | 176 | .3 | 587 | Ballast for AD-DC filament circuits | ||
| 8 | 132 | .3 | 440 | Ballast for AD-DC filament circuits | ||
| 9 | 50 | .3 | 167 | Ballast for AD-DC filament circuits | ||
Special Philco Tube Types
| TYPE |
|
| XXB | 3C6 |
| XXD | 14AF7 |
| XXFM | 7X7 |
| XXL | 7A4 |
| FM1000 | No Known Sub |
Here is additional information regarding the FM1000 tube and its uses in early FM radios.
