• Country
• United States of America (USA)

• Manufacturer / Brand
• Jensen Radio Manufacturing Co.; Chicago, IL, Oakland, CA

• Year
• 1930 ?

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 172197

• Number of Transistors

• Semiconductors
• Tr.Gl.=Metal-rectif.

• Wave bands
• - without

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

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 9.75 inch = 24.8 cm

• Material
• Metal case

• from Radiomuseum.org
• Model: Dynamic Speaker D4-AC - Jensen Radio Manufacturing Co.

• Shape
• Chassis only or for «building in»

• Notes
• Speaker with field power supply. Metal (dry) rectifier.

• Net weight (2.2 lb = 1 kg)
• 14.6 lb (14 lb 9.6 oz) / 6.628 kg

• Author
• Model page created by Gottfried Silberhorn. See "Data change" for further contributors.

• Other Models

• Here you find 64 models, 61 with images and 10 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Jensen Radio Manufacturing Co.; Chicago, IL, Oakland, CA