• Country
• United States of America (USA)

• Manufacturer / Brand
• Telephone Maintenance Co.; Chicago, Illinois (Telmaco)

• Year
• 1921/1922

• Category
• Radio module post 1925 (not a part, not a key)

• Radiomuseum.org ID
• 106450

• • Brand: Telmaco

• Number of Tubes
• 2

• Valves / Tubes
• UV200 UV201

• Main principle
• Detector with Vacuum Tube (Valve), no tuner; 1 AF stage(s)

• Wave bands
• - without

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

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Detector & One-Stage Amplifier Type TDA-1 - Telephone Maintenance Co.;

• Shape
• Tablemodel, Box - most often with Lid (NOT slant panel).

• Dimensions (WHD)
• 8 x 7 x 6.5 inch / 203 x 178 x 165 mm

• Notes

• Telemaco Type TDA-1 Detector and One-Stage Audio Amplifier

• Price in first year of sale
• 35.00 $

• Source of data
• -- Collector info (Sammler)

• Mentioned in
• Radio News (November, 1921 Radio News advertisement)

• Author
• Model page created by John Koster. See "Data change" for further contributors.

• Other Models

• Here you find 16 models, 13 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Telephone Maintenance Co.; Chicago, Illinois (Telmaco)