• Country
• United States of America (USA)

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

• Year
• 1937/1938

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 164169

• • Brand: Grunow (trade name)

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

• Number of Tubes
• 4

• Valves / Tubes
• 1A6 1A4 75 41

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

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Storage Battery for all (e.g. for car radios and amateur radios) / 6 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 8 inch = 20.3 cm

• Material
• Wooden case

• from Radiomuseum.org
• Model: Grunow 410 Ch= 4-NB - General Household Utilities Co

• Shape
• Tablemodel, Tombstone = decorative upright, not cathedral but can have rounded edges.

• Dimensions (WHD)
• 13.25 x 19 x 9.5 inch / 337 x 483 x 241 mm

• Notes

• Farm radio; synchr. vibrator for +B.

• Circuit diagram reference
• Rider's Perpetual, Volume 8 = 1937 and before

• Mentioned in
• Machine Age to Jet Age II (page 152.)

• Literature/Schematics (1)
• Cathedral & Tombstone Radios (page 129.)

• Literature/Schematics (3)
• The Grunow Folder for 1938.

• Author
• Model page created by Hans-Joachim Korn † 16.11.15. See "Data change" for further contributors.

• 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.