• Country
• Germany

• Manufacturer / Brand
• Grawor, Rundf.techn.Erz. Grass & Worff (REG); Berlin

• Year
• 1929

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 75052

• • alternative name: Gravor

• Wave bands
• - without

• Power type and voltage
• Other, details in remarks or not known.

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 22 cm = 8.7 inch

• from Radiomuseum.org
• Model: Dynamo Type B - Grawor, Rundf.techn.Erz. Grass

• Notes
• Niederohmig (Type A hochohmig), für Gleichstrom 90,-Mk. oder Wechselstrom (mit Gleichrichter) 141,-Mk., auch im Eichen-Holzgehäuse.

• Net weight (2.2 lb = 1 kg)
• 3.7 kg / 8 lb 2.4 oz (8.15 lb)

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Mentioned in
• -- Original prospect or advert

• Literature/Schematics (1)
• Die Sendung (Nr. 35, 1929)

• Author
• Model page created by Wolfgang Eckardt. See "Data change" for further contributors.

• Other Models

• Here you find 145 models, 139 with images and 3 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Grawor, Rundf.techn.Erz. Grass & Worff (REG); Berlin