• Country
• Germany

• Manufacturer / Brand
• ROKA, Robert Karst; Berlin

• Year
• 1935–1937

• Category
• Detector-Radio (Crystal or diode, without tubes/transistors)

• Radiomuseum.org ID
• 16844

• Main principle
• Crystal or Solid State Detector; Crystal-detection 1 circuit (no tubes)

• Tuned circuits
• 1 AM circuit(s)

• Wave bands
• Broadcast (MW) and Long Wave.

• Power type and voltage
• No Power needed

• Loudspeaker
• - For headphones or amp.

• Material
• Bakelite case

• from Radiomuseum.org
• Model: Pikkolo 1251 [MW/LW] - ROKA, Robert Karst; Berlin

• Dimensions (WHD)
• 48 x 60 x 30 mm / 1.9 x 2.4 x 1.2 inch

• Notes

• Für Mittel- und Langwelle (200-2000 m). Mit Sirutor.

• Net weight (2.2 lb = 1 kg)
• 0.055 kg / 0 lb 1.9 oz (0.121 lb)

• Price in first year of sale
• 2.50 RM

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

• Source of data
• Katalog Radio-Zentrale Alex v. Prohaska 1935/1936 / Radiokatalog Band 2, Ernst Erb

• Mentioned in
• Historische Radios Band IV (p.14,15)

• Other Models

• Here you find 25 models, 24 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