• Country
• United States of America (USA)

• Manufacturer / Brand
• Thordarson Electric Mfg. Co. ; Chicago (IL)

• Year
• 1937 ??

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 219991

• Number of Tubes
• 9

• Valves / Tubes
• 6J7 6J7 6F5 6C5 6F6 6L6 6L6 5Z3 5Z3

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC)

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

• Power out
• 40 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: T-20W40 - Thordarson Electric Mfg. Co. ;

• Shape
• Tablemodel, low profile (big size).

• Notes
• PA amplifier with 4 inputs.

• Net weight (2.2 lb = 1 kg)
• 47 lb (47 lb 0 oz) / 21.338 kg

• Author
• Model page created by Gottfried Silberhorn. See "Data change" for further contributors.

• Other Models

• Here you find 65 models, 53 with images and 22 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Thordarson Electric Mfg. Co. ; Chicago (IL)