Improved Shielded Laboratory Receiver SG440 (440 SG)

Silver - Marshall; Chicago, IL

  • Year
  • 1927
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 223901

 Technical Specifications

  • Number of Tubes
  • 8
  • Main principle
  • Superheterodyne (common); Screengrid 1926-1935
  • Tuned circuits
  • 6 AM circuit(s)
  • Wave bands
  • Broadcast (MW) and Long Wave.
  • Power type and voltage
  • Storage and/or dry batteries
  • Loudspeaker
  • - This model requires external speaker(s).
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Improved Shielded Laboratory Receiver SG440 - Silver - Marshall; Chicago, IL
  • Shape
  • Tablemodel, Box - most often with Lid (NOT slant panel).
  • Notes
  • Featuring the SG440 time signal amplifier whose layout includes 3 screen grid tetrodes type 22 and a triode detector 00A. It is NOT the conventional 01A based MF amplifier. Wave change by different plug-in coils (Antenna and Oscillator coil).

  • Author
  • Model page created by Luca Posca. See "Data change" for further contributors.

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