• Country
• United States of America (USA)

• Manufacturer / Brand
• Steinite Radio Co., Warwick Mfg.Co.; Atchinson

• Year
• 1930

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 59948

• • Brand: Marvel

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

• Number of Tubes
• 6

• Valves / Tubes
• 24 24 24 45 45 80

• Main principle
• TRF without regeneration; 1 AF stage(s); Screengrid 1926-1935

• Tuned circuits
• 3 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC) / 110 Volt

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

• from Radiomuseum.org
• Model: 421 Ch= 21 - Steinite Radio Co., Warwick

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

• Notes
• One dial (primary tuning control knob) . Push-pull audio amplifier.

• External source of data
• Ernst Erb

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

• Circuit diagram reference
• Rider's Perpetual, Volume 2 = 1932 (Models 1931/1932)

• Mentioned in
• The Radio Collector's Directory and Price Guide 1921 - 1965 (Rider's 2-4, 2-5)

• Literature/Schematics (1)
• Cathedral & Tombstone Radios (page 256.)

• Other Models

• Here you find 90 models, 26 with images and 45 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Steinite Radio Co., Warwick Mfg.Co.; Atchinson