• Country
• United States of America (USA)

• Manufacturer / Brand
• Detrola; Detroit (MI)

• Year
• 1939

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 37252

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

• Number of Tubes
• 5

• Valves / Tubes
• 12A8GT 12K7GT 12Q7GT 35L6GT 35Z4GT

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s)

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• AC/DC-set / 105-125 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil)

• Material
• Bakelite or Plastics (type unknown)

• from Radiomuseum.org
• Model: 274 [Split Grille] - Detrola; Detroit MI

• Shape
• Tablemodel without push buttons, Mantel/Midget/Compact up to 14

• Notes

• Built-in loop antenna as first RF circuit.
  NOT Catalin! Catalin models are 281.

  Colors:
  - walnut with tan grille and knobs
  - ivory with red grille and knobs
  - ebony with onyx grille and knobs
  - blue with white grille and knobs
  - red with black grille and knobs
  - onyx with chinese red grille and knobs

  There is also a Catalin fake 274 split grille known.

• External source of data
• Ernst Erb

• Source of data
• The Radio Collector's Directory and Price Guide 1921 - 1965

• Circuit diagram reference
• Rider's Perpetual, Volume 10 = 1939 and before

• Mentioned in
• Table Top Radios Vol. 1 Stein 98

• Other Models

• Here you find 334 models, 195 with images and 291 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Detrola; Detroit (MI)