• Country
• United States of America (USA)

• Manufacturer / Brand
• Electrical Research Laboratories Inc. (Erla); Chicago, Illinois

• Year
• 1925

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 38177

• Number of Tubes
• 5

• Valves / Tubes
• UV199 UV199 UV199 UV199 UV199

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

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Dry Batteries

• Loudspeaker
• - This model requires external speaker(s).

• Material
• Leather / canvas / plastic - over other material

• from Radiomuseum.org
• Model: Superflex Model 5-L-199 [Portable] - Electrical Research

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

• Dimensions (WHD)
• 19 x 15 x 8 inch / 483 x 381 x 203 mm

• Notes
• Two dials (primary tuning control knobs)

• Price in first year of sale
• 145.00 $

• External source of data
• Ernst Erb

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

• Literature/Schematics (1)
• Radio News (March, 1925 Radio News magazine page 1653)

• Other Models

• Here you find 134 models, 47 with images and 61 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Electrical Research Laboratories Inc. (Erla); Chicago, Illinois