• Country
• United States of America (USA)

• Manufacturer / Brand
• Detrola; Detroit (MI)

• Year
• 1934

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 37356

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

• Number of Tubes
• 4

• Valves / Tubes
• 78 77 45 25Z5

• Main principle
• TRF without regeneration; 1 AF stage(s)

• Tuned circuits
• 2 AM circuit(s)

• Wave bands
• Broadcast and Short Wave (SW).

• Power type and voltage
• AC/DC-set / 110 Volt

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

• from Radiomuseum.org
• Model: 4F - Detrola; Detroit MI

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

• Notes
• Two Bands BC 550 - 1500 KC; SW 75-200 m

• 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 6 = 1935 and before

• 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)