• Country
• United States of America (USA)

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

• Year
• 1936/1937

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 42614

• • Brand: Grunow (trade name)

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

• Number of Tubes
• 12

• Valves / Tubes
• 6K7 6A8 6K7 6K7 6H6 6C5 6C5 6C5 6J7 6L6 6L6 5Z3

• Main principle
• Superhet with RF-stage; ZF/IF 465 kHz; 3 AF stage(s)

• Tuned circuits
• 9 AM circuit(s)

• Wave bands
• Broadcast plus 2 Short Wave bands.

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

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

• Material
• Wooden case

• from Radiomuseum.org
• Model: Grunow 1297 Teledial Ch= 12W - General Household Utilities Co

• Shape
• Console with any shape - in general

• Dimensions (WHD)
• 29.5 x 42 x 16.75 inch / 749 x 1067 x 425 mm

• Notes

• Beitman shows Grunow chassis: 12B, 12W for models: 1291, 1297 for the same schematic. The same is for Rider's page 7-35 for General Household. One might think both chassis are used for both models but we believe it is meant only that the Grunow chassis 12B is used for model 1291 and the 12W chassis for model 1297. Therefore we show two models, not 4 as other sources. This model has 12 metal tubes, 540-18,000 kc., Teledial, "beam" type power tube.

  The Grunow model 1297 is al least by cabinet and most of the chassis (or all) the same as Grunow model 1291 but Stein "Pre-War Consoles", page 96 shows a wrong model for 1297 - with 5 knobs. We don't know yet the correct model number for that.

  According to Rider's pgs 8-44 & 8-45 for Grunow, the power output tubes are 2-6F6 on chassis 12B (Model 1291), and 2-6L6 on chassis 12W (Model 1297). See this article containing Teledial models. Also Teledial models of other brands are covered. In particular the nine 1936/37 Grunow models presented in "Radio Retailing", March 1937, are linked.

• Price in first year of sale
• 139.95 $

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 7 = 1936 and before

• Mentioned in
• Pre-War Consoles

• Literature/Schematics (1)
• Beitman Radio Diagrams, Vol. 01, 1926-1938 (Rider's Perpetual, Volume 8 = 1937 and before)

• Literature/Schematics (2)
• Radio Retailing (Radio & Television R.) (March 1937.)

• Literature/Schematics (3)
• The Grunow Folder for 1937.

• 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.