• Country
• United States of America (USA)

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

• Year
• 1931

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 59968

• • Brand: Marvel

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

• Number of Tubes
• 8

• Valves / Tubes
• 227 224 224 224 227 245 245 280

• Main principle
• Superhet with RF-stage; ZF/IF 175 kHz; 1 AF stage(s)

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC) / 105-115 Volt

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

• Material
• Wooden case

• from Radiomuseum.org
• Model: 643 Ch= 22 - Steinite Radio Co., Warwick

• Notes
• Push-pull audio amplifier.

• External source of data
• Ernst Erb

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

• Mentioned in
• Rider's 2-1

• Literature/Schematics (1)
• -- Schematic

• 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