• Year
  • 1937 ??
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 188097

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Tubes
  • 8
  • Main principle
  • Superheterodyne (common); ZF/IF 456 kHz
  • Wave bands
  • Broadcast, Short Wave(s) and Police.
  • Power type and voltage
  • Alternating Current supply (AC) / 110 Volt
  • Loudspeaker
  • Permanent or electro-dynamic (moving coil), system not known yet.
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: 257 - Clinton Mfg.Co.; Chicago, IL
  • Shape
  • Tablemodel, low profile (big size).
  • Dimensions (WHD)
  • 17.75 x 10.25 x 7.25 inch / 451 x 260 x 184 mm
  • Notes
  • The Sylvania Tube Complement Manual 2nd edition lists the following tubes for the type 257:
    6J7G 6K7G 6F5G 6H6G 6U5 or 6G5 6C5G 6F6G 5Y3G

    There may be early and late versions of this model.

    Frequency ranges: 550 - 1600 kHz, 1.7 - 5 MHz, 5.5 - 18 MHz.

  • Price in first year of sale
  • 44.95 USD
  • Source of data
  • -- Schematic
  • Author
  • Model page created by John Backscheider. See "Data change" for further contributors.

 Collections | Museums | Literature

 Forum