• 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
• 161591

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

• Number of Tubes
• 2

• Valves / Tubes
• WD12 or C12_Triode WD12 or C12_Triode

• Main principle
• TRF with regeneration

• Tuned circuits
• 1 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Dry Batteries

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

• Material
• Wooden case

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

• Shape
• Portable set > 8 inch (also usable without mains)

• Notes

• One dial (primary tuning control knob) ; space for batteries;
  There is also a version using UV199 exclusively.
  
  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).

• Source of data
• Collector's Guide to Antique Radios (7th Edition)

• Mentioned in
• Radio Manufacturers of the 1920s, Vol 1

• Literature/Schematics (1)
• Radio Collector`s Guide 1921-1932

• Author
• Model page created by Konrad Birkner † 12.08.2014. See "Data change" for further contributors.

• Other Models

• Here you find 1791 models, 1049 with images and 1285 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Crosley Radio Corp.; Cincinnati (OH)