• Year
  • 1933/1934
perfect model
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 34992

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

 Technical Specifications

  • Number of Tubes
  • 11
  • Main principle
  • Superhet with RF-stage; 3 AF stage(s)
  • Tuned circuits
  • 9 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Details
  • Record-Changer, both sides!; Visual Tuning Indicator pre Eye
  • Power type and voltage
  • Alternating Current supply (AC) / 60 cycles, 115 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: 104 Cosmopolitan Ch= Z, W-904 - Capehart Corp.; Fort Wayne, IN
  • Shape
  • Console with any shape - in general
  • Notes
  • The Rider's schematic W-904 for models 103, 104 Cosmopolitan, chassis "Z" is dated March 14, 1934. It is for a superhet with RF stage tube 78, 6A7 osc.mixer, 2 xc 78 IF, 75 det and AM amplifier on same chassis. It shows a tuning meter. Field 555 ohms for speaker.
    The tube 6A7 can not be earlier than 1933, Riders is Spring 1934. No IF given there.

    According to Baumbach page 12 this is one model of the earlyer group with designation 101 through 106, made about 1932, designed for the home like the later series 100 which begun 1938/39 season. Rider's shows a model 103 and 104 Cosmopolitan with chassis W-904 with 11 tubes, but the model 101 seems to have 13 tubes. Baumbach presumes that the models employ an Amperion changer. 101 is most probably earlier than 1935!
    See here the "Common information for the Capehart model pages for the 1930s and 1940s".

  • External source of data
  • Ernst Erb

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