• Country
• United States of America (USA)

• Manufacturer / Brand
• Radio Development Company; San Francisco

• Year
• 1920

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 230056

• Number of Tubes
• 1

• Valves / Tubes
• VT-Class-II or A_Moorhead VT-Class-II or UV201

• Main principle
• Audio-Amplification; 1 AF stage(s)

• Wave bands
• - without

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

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

• Material
• TUBES VISIBLE, material not known.

• from Radiomuseum.org
• Model: One-Stage Audio Amplifier - Radio Development Company; San

• Shape
• Tablemodel, with any shape - general.

• Notes

• Radio Development Company One-Stage Audio Amplifier

• Price in first year of sale
• 13.75 USD

• Literature/Schematics (1)
• December 1920 Pacific Radio News magazine advertisement page 58

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

• Other Models

• Here you find 3 models, 3 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Radio Development Company; San Francisco