• Country
• United States of America (USA)

• Manufacturer / Brand
• Pontree Radio Laboratory; Brooklyn, New York

• Year
• 1925

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 52173

• Number of Tubes
• 5

• Valves / Tubes

• Main principle
• TRF (Tuned-Radio-Frequency but use of regeneration unknown)

• Power type and voltage
• Storage and/or dry batteries

• from Radiomuseum.org
• Model: Engler SDV - Pontree Radio Laboratory;

• Notes
• Two dials (primary tuning control knobs)

• Price in first year of sale
• 70.00 $

• External source of data
• Ernst Erb

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

• Other Models

• Here you find 2 models, 0 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Pontree Radio Laboratory; Brooklyn, New York