• Country
• United States of America (USA)

• Manufacturer / Brand
• Stewart Warner Corp.; Chicago (IL)

• Year
• 1947

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 61653

• • Brand: Ferrodyne

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

• Number of Tubes
• 5

• Valves / Tubes
• 12BE6 12BA6 12AT6 50B5 35W4

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s)

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• AC/DC-set / 110 - 120 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 3.5 inch = 8.9 cm

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: A51T4 "Air Pal" Ch= 9020-D - Stewart Warner Corp.; Chicago

• Shape
• Tablemodel without push buttons, Mantel/Midget/Compact up to 14

• Notes
• Color=Black.

• External source of data
• Ernst Erb

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

• Circuit diagram reference
• Rider's Perpetual, Volume 17 = 1948 and before

• Mentioned in
• Beitman Radio Diagrams 1948

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Set 17, Folder 477-32)

• Other Models

• Here you find 2111 models, 391 with images and 1968 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Stewart Warner Corp.; Chicago (IL)