• Country
• United States of America (USA)

• Manufacturer / Brand
• Automatic Radio Mfg. Co.; Boston (MA)

• Year
• 1929

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 33779

• Number of Tubes
• 4

• Valves / Tubes

• Main principle
• TRF (Tuned-Radio-Frequency but use of regeneration unknown); Screengrid 1926-1935

• Power type and voltage
• Dry Batteries

• from Radiomuseum.org
• Model: BTom Thumb - Automatic Radio Mfg. Co.;

• Shape
• Portable set > 8 inch (also usable without mains)

• Notes
• One dial (primary tuning control knob)

• Price in first year of sale
• 57.00 $

• External source of data
• Ernst Erb

• Source of data
• Radio Collector`s Guide 1921-1932

• Other Models

• Here you find 401 models, 163 with images and 321 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Automatic Radio Mfg. Co.; Boston (MA)