"Midget" Radiophone Transmitter Type OT-3

DeForest Radio Telephone & Telegraph Co. (De Forest); New York

Data
Forum
Pictures
Collections

  • Year
  • 1921
  • Category
  • Amateur Transmitter (only)
  • Radiomuseum.org ID
  • 195802
    • alternative name: Lee De Forest Mfg.

 Technical Specifications

  • Number of Tubes
  • 3
  • Main principle
  • Transmitter
  • Wave bands
  • - without
  • Power type and voltage
  • Powered by external power supply or a main unit.
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: "Midget" Radiophone Transmitter Type OT-3 - DeForest Radio Telephone &
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 9 x 9 x 0 inch / 229 x 229 x 0 mm
  • Notes
  • The DeForest Type OT-3 transmitter consisted of two panels. The left panel contains the aerial oscillating circuit with all necessary controls. A send/receive switch is also located near the base of the panel. The antennae and plate taps on the helix, in the rear of the panel, are controlled by the 10-point switches shown on the face. The right panel had a 0-1 amp hot-wire ammeter, three standard UV tube sockets and a modulation transformer.
  • Net weight (2.2 lb = 1 kg)
  • 14 lb (14 lb 0 oz) / 6.356 kg
  • Price in first year of sale
  • 100.00 $
  • Literature/Schematics (1)
  • DeForest "Interpanel" Sets Catalogue "E"
  • Author
  • Model page created by Alan Larsen. See "Data change" for further contributors.

 Collections | Museums | Literature

Collections

The model "Midget" Radiophone Transmitter is part of the collections of the following members.

 Forum