• Country
• United States of America (USA)

• Manufacturer / Brand
• DeForest Radio Telephone & Telegraph Co. (De Forest); New York

• Year
• 1919 ?

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

• Radiomuseum.org ID
• 194067

• • alternative name: Lee De Forest Mfg.

• Number of Tubes
• 1

• Valves / Tubes
• VT-Class-I or B_Moorhead-Shaw

• Main principle
• Detector with Vacuum Tube (Valve), no tuner

• Wave bands
• - without

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

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Audion Control Panel Type P-100 - DeForest Radio Telephone &

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

• Dimensions (WHD)
• 9.375 x 12.5 x 7.75 inch / 238 x 318 x 197 mm

• Notes
• The P-100 is a new type of Audion Control panel and is remarkably flexible in its applications. It is designed for the De Forest standard V.T. audion tube. It may be used with any tuner as a detector or oscillator, and by a slight change in connections it becomes a one-step audio amplifier.

• Net weight (2.2 lb = 1 kg)
• 35 lb (35 lb 0 oz) / 15.890 kg

• Price in first year of sale
• 60.00 $

• Literature/Schematics (1)
• Sears Catalog circa 1919

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

• Other Models

• Here you find 158 models, 133 with images and 16 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from DeForest Radio Telephone & Telegraph Co. (De Forest); New York