• Country
• United States of America (USA)

• Manufacturer / Brand
• Detrola; Detroit (MI)

• Year
• 1934

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 37355

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

• Number of Tubes
• 4

• Valves / Tubes
• 78 77 42 80

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

• Tuned circuits
• 2 AM circuit(s)

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• Alternating Current supply (AC) / 110 Volt

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

• Material
• Wooden case

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

• Shape
• Table-Cathedral-Type (upright, round top or gothic arch, not rounded edges only).

• Dimensions (WHD)
• 260 x 310 x 160 mm / 10.2 x 12.2 x 6.3 inch

• Notes
• Riders shows 2 bands (BC and Police?), Bunis/Slusser says BC only.

• Net weight (2.2 lb = 1 kg)
• 4 kg / 8 lb 13 oz (8.811 lb)

• External source of data
• Ernst Erb

• Source of data
• Collector's Guide to Antique Radios (7th Edition)

• Circuit diagram reference
• Rider's Perpetual, Volume 5 = ca. 1934 and before

• Mentioned in
• The Radio Collector's Directory and Price Guide 1921 - 1965

• Other Models

• Here you find 330 models, 192 with images and 287 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Detrola; Detroit (MI)