Black Diamond
|
|
|
|
Year:
1923
|
Category: Detector-Radio (Crystal or diode, without tubes/transistors) |
| Main principle |
Crystal or Solid State Detector
|
| Wave bands |
Broadcast only (MW). |
| Details |
|
| Power type and voltage |
No Power needed |
| Loudspeaker |
- For headphones or amp. |
| Power out |
|
| from Radiomuseum.org |
Model: Black Diamond - National Industries Inc.; |
| External source of data |
Ernst Erb |
| Source of data |
Radio Collector`s Guide 1921-1932 |
All listed radios etc. from National Industries Inc.; (where?)
Here you find 3 models, 0 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
