• Country
• United States of America (USA)

• Manufacturer / Brand
• Firth, John & Co. (Firco); New York, (NY)

• Year
• 1921 ?

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 306372

• Number of Tubes
• 3

• Valves / Tubes

• Main principle
• Audio-Amplification; 3 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: Three-Stage Audio Amplifier - Firth, John & Co. Firco; New

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

• Author
• Model page created by Alan Larsen. See "Data change" for further contributors.

• Other Models

• Here you find 23 models, 21 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Firth, John & Co. (Firco); New York, (NY)