• Country
• Germany

• Manufacturer / Brand
• ROKA, Robert Karst; Berlin

• Year
• 1933/1934

• Category
• Radio part (not a module) 

• Radiomuseum.org ID
• 16842

• Power type and voltage
• No Power needed

• Loudspeaker
• - For headphones or amp.

• Material
• Bakelite case

• from Radiomuseum.org
• Model: Tonregler Lautstärkeregler - ROKA, Robert Karst; Berlin

• Notes
• Lautstärkeregler "Tonregler". Potentiometerschaltung, 0 - 10 kOhm. Anschlusstifte umsteckbar vom "Fuß" zur Rückseite.

• Price in first year of sale
• 3.00 RM

• External source of data
• E. Erb 3-907007-36-0

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Mentioned in
• Katalog Radio-Zentrale Prohaska 1928 (1933/34)

• Other Models

• Here you find 24 models, 23 with images and 3 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from ROKA, Robert Karst; Berlin