• Country
• United States of America (USA)

• Manufacturer / Brand
• General Household Utilities Co. (Grunow); Chicago Ill.

• Year
• 1934

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 42666

• • Brand: Grunow (trade name)

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

• Number of Tubes
• 4

• Valves / Tubes
• 6F7 6F7 42 84

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz

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

• Power type and voltage
• Alternating Current supply (AC) / 115 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 8 inch = 20.3 cm

• Material
• Wooden case

• from Radiomuseum.org
• Model: Grunow 450 Ch= 4-A - General Household Utilities Co

• Shape
• Console with any shape - in general

• Dimensions (WHD)
• 9.5 x 13.25 x 6.625 inch / 241 x 337 x 168 mm

• Notes

• Colours and material: Wood with chrome grille. Natural finish or Ivory lacquer finish. Power Consumption 35 Watts.

  Stein "Cathedral & Tombstone Radios" lists 1 band for this model.

• 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 5 = ca. 1934 and before

• Literature/Schematics (1)
• Rider's Perpetual, Volume 7 = 1936 and before (The Grunow Folder for 1934.)

• Literature/Schematics (2)
• Table Top Radios Vol. 1 Stein 98 (page 89.)

• Literature/Schematics (3)
• Machine Age to Jet Age II (page 39.)

• Literature/Schematics (4)
• Cathedral & Tombstone Radios (page 130.)

• Other Models

• Here you find 138 models, 100 with images and 126 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from General Household Utilities Co. (Grunow); Chicago Ill.