• Country
• United States of America (USA)

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

• Year
• 1921

• Category
• Radio module pre 1926 (not a part, not a key)

• Radiomuseum.org ID
• 196055

• • Brand: Telmaco

• Number of Tubes
• 3

• Valves / Tubes
• UV200 or UV201 UV201 UV201

• Main principle
• Detector with Vacuum Tube (Valve), no tuner; 2 AF stage(s)

• Wave bands
• - without

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

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

• Material
• Wooden case

• from Radiomuseum.org
• Model: Telmaco Detector and Two-Stage Amplifier Type TDA-2 - Telephone Maintenance Co.;

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

• Notes
• The Telephone Maintenance Co. Type TDA-2 Telmaco Detector and Two-Stage Audio Amplifier was advertised in the November 1921 Radio News magazine.

• Price in first year of sale
• 45.00 $

• Literature/Schematics (1)
• November 1921 Radio News advertisement page 428

• Author
• Model page created by Alan Larsen. 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)