• Country
• United States of America (USA)

• Manufacturer / Brand
• Sleeper Radio Corp.; New York (NY)

• Year
• 1924

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 58164

• Number of Tubes
• 4

• Valves / Tubes

• Main principle
• TRF without regeneration; Reflex

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Storage and/or dry batteries

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Monotrol 54 - Sleeper Radio Corp.; New York

• Shape
• Tablemodel, slant panel.

• Notes
• CIR.=Grimes Inv. Dupx . Four tubes do the work of seven: three RF, one Detector, three Audio. single dial tuning. Dial calibrated in wavelength. Sold later for 130 USD and then even for 39 USD (Dec.1925)

• Price in first year of sale
• 160.00 $

• External source of data
• Ernst Erb

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

• Mentioned in
• The Radio Collector's Directory and Price Guide 1921 - 1965

• Literature/Schematics (1)
• Radio Manufacturers of the 1920's, Vol. 3 (p.100)

• Other Models

• Here you find 35 models, 21 with images and 2 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sleeper Radio Corp.; New York (NY)