Duo Dynamic Speaker
Electrical Research Laboratories Inc. (Erla); Chicago, Illinois
- Country
- United States of America (USA)
- Manufacturer / Brand
- Electrical Research Laboratories Inc. (Erla); Chicago, Illinois
- Year
- 1928
- Category
- Loudspeaker, headphone or earphone
- Radiomuseum.org ID
- 227930
- Wave bands
- - without
- Power type and voltage
- Powered by external power supply or a main unit.
- Loudspeaker
- Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
- Material
- Metal case
- from Radiomuseum.org
- Model: Duo Dynamic Speaker - Electrical Research
- Shape
- Chassis only or for «building in»
- Notes
-
Different voltages:
110 V AC : $42.50
6 V DC : $30.00
110 V DC : $35.00
- Source of data
- Radio Retailing (Radio & Television R.)
- Author
- Model page created by Heiko zur Mühlen. See "Data change" for further contributors.
- Other Models
-
Here you find 133 models, 47 with images and 61 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Electrical Research Laboratories Inc. (Erla); Chicago, Illinois