• Country
• United States of America (USA)

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

• Year
• 1935/1936

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 42722

• • Brand: Grunow (trade name)

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

• Number of Tubes
• 6

• Valves / Tubes
• 6A8 6K7 6H6 6F5 6F6 5Z4

• Main principle
• Superheterodyne (common); ZF/IF 465 or 490 kHz

• Wave bands
• Broadcast, Short Wave(s) and Police.

• 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 680 Ch= 6-G - General Household Utilities Co

• Shape
• Tablemodel, high profile (upright - NOT Cathedral nor decorative).

• Dimensions (WHD)
• 13.375 x 18.625 x 9.5 inch / 340 x 473 x 241 mm

• Price in first year of sale
• 59.50 $

• 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

• Mentioned in
• Machine Age to Jet Age II (Rider's Perpetual, Volume 7 = 1936 and before)

• Literature/Schematics (1)
• Collector's Guide to Antique Radios (6th edition)

• Literature/Schematics (2)
• - - Manufacturers Literature

• Literature/Schematics (3)
• Cathedral & Tombstone Radios (page 131.)

• Literature/Schematics (4)
• The Grunow Folder for 1936.

• 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.