• Country
• United States of America (USA)

• Manufacturer / Brand
• Grigsby-Grunow (-Hinds) Co. (Majestic pre 1933); Chicago (IL)

• Year
• 1932/1933

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 43666

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

• Number of Tubes
• 6

• Valves / Tubes
• 35S 35S 27S 24S 47 80

• Main principle
• Superheterodyne (common); ZF/IF 175 kHz; 2 AF stage(s); Screengrid 1926-1935

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC) / 60 watts, 50 to 60 cycles, 115 Volt

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

• Material
• Wooden case

• from Radiomuseum.org
• Model: Majestic Ardmore 56 Ch= 55 - Grigsby-Grunow -Hinds Co.

• Shape
• Table-Cathedral-Type (upright, round top or gothic arch, not rounded edges only).

• Notes
• According to the service manual, the chassis 55 is for the Majestic models Ardmore 56, Berkshire 57 and Viking 58. There is a 3-gang tuning condenser by using a RF bandfilter. According to Rider's 3-1 They use the model G-10-D dynamic speaker with a field resistance of 1650 ohms at 57 degree F. Heavy "U" construction as model G-10-B dynamic speaker and has a hum buck coil. The chassis uses one or more spray shield tubes. They have the same number with an "S" added. The service manual is dated February 1932, and the chassis schematic is dated May 1, 1932 and November 1, 1932.
  This model Majestic Ardmore 56 should not to be confused with the later Tombstone 56 from 1938 by Majestic nor with the model 55 with chassis 500.

• Price in first year of sale
• 44.00 $

• External source of data
• Ernst Erb

• Source of data
• Radio Collector`s Guide 1921-1932

• Circuit diagram reference
• Rider's Perpetual, Volume 3 = 1933 and before

• Mentioned in
• Collector's Guide to Antique Radios (7th Edition)

• Literature/Schematics (1)
• Beitman Radio Diagrams, Vol. 01, 1926-1938

• Literature/Schematics (2)
• Cathedral & Tombstone Radios (page 169.)

• Other Models

• Here you find 201 models, 122 with images and 157 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Grigsby-Grunow (-Hinds) Co. (Majestic pre 1933); Chicago (IL)