early 51

• Country
• United States of America (USA)

• Manufacturer / Brand
• Crosley Radio Corp.; Cincinnati (OH)

• Year
• 1924

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 36374

• Picture
• Schematics

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

• Number of Tubes
• 2

• Valves / Tubes
• UV201A UV201A

• Main principle
• TRF with regeneration; 1 AF stage(s)

• Tuned circuits
• 1 AM circuit(s)

• Wave bands
• Broadcast only (MW).

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

• Loudspeaker
• - This model requires external speaker(s).

• Material
• Wooden case

• from Radiomuseum.org
• Model: early 51 - Crosley Radio Corp.;

• Shape
• Tablemodel, Box - most often with Lid (NOT slant panel).

• Dimensions (WHD)
• 280 x 155 x 110 mm / 11 x 6.1 x 4.3 inch

• Notes

• from Feb. to July 1924;
  Operating instructions (see tech.info) show a choice of completely different tube configurations:
  2 x UV201A needs a 6 v storage "A" Battery
  2 x WD12 uses 1.5 v dry "A" Battery
  2 x UV199 requires 3 x 1.5 v (= 4.5 v) dry batteries plus socket adaptors.
  Same is valid for the Cunningham equivalents.
  
  Later models could also use the following combinations:
  2 x UX199;
  2 x UX201A;
  and for increased output power:
  UX201A and UX112A
  UX201A and UX171A;
  UX199 and UX120;
  
  Later models have a terminal to connect a "C" bias battery in case of operation with an output tube of increased power: UX112A(max0.2 Watt); UX171A (max.0.7 Watt); UX120 (max.0.11 Watt).

• Net weight (2.2 lb = 1 kg)
• 2.1 kg / 4 lb 10 oz (4.626 lb)

• Price in first year of sale
• 19.00 $

• External source of data
• Ernst Erb

• Source of data
• Collector's Guide to Antique Radios 4. Edition

• Circuit diagram reference
• Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)

• Mentioned in
• The Radio Collector's Directory and Price Guide 1921 - 1965 (Radio Collectors Guide 1921-1932 Revised Edition, 1981)

• Literature/Schematics (1)
• Radio Manufacturers of the 1920s, Vol 1

• Other Models

• Here you find 1791 models, 1049 with images and 1282 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Crosley Radio Corp.; Cincinnati (OH)