- Country
- Germany
- Manufacturer / Brand
- Grassmann, Peter, RFW, Radio-Funk-Werkstätten; vor 1945, Berlin & Neuhaldensleben
- Year
- 1929/1930
- Category
- Loudspeaker, headphone or earphone
- Radiomuseum.org ID
- 14837
- Power type and voltage
- Other, details in remarks or not known. / DC 4-6; 110; 220 Volt
- Loudspeaker
- Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
- Material
- Various materials
- from Radiomuseum.org
- Model: Helios Dynamus - Grassmann, Peter, RFW, Radio-
- Notes
-
4 Modelle für Wechsel- oder Gleichstrom, ohne (68,- RM) oder mit Holzgehäuse.
Impedance 2000 Ohms.
- Price in first year of sale
- 98.00 RM
- External source of data
- E. Erb 3-907007-36-0
- Source of data
- Arlt's grosser Radiokatalog 1930 / Radiokatalog Band 2, Ernst Erb
- Mentioned in
- Rundfunkjahrbuch 1929
- Other Models
-
Here you find 111 models, 76 with images and 30 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Grassmann, Peter, RFW, Radio-Funk-Werkstätten; vor 1945, Berlin & Neuhaldensleben
Collections
The model Helios is part of the collections of the following members.