• Country
• United States of America (USA)

• Manufacturer / Brand
• Automatic Radio Mfg. Co.; Boston (MA)

• Year
• 1939

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 33833

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

• Number of Tubes
• 5

• Valves / Tubes
• 1A7G 1N5G 1H5G 1A5G 25Z6

• Main principle
• Superheterodyne (common); ZF/IF 456 kHz

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Line / Batteries (any type)

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)

• from Radiomuseum.org
• Model: P57 [octal tubes] - Automatic Radio Mfg. Co.;

• Notes

• Built-in loop antenna.

  There is also a post-war model Automatic P-57 with miniature tubes.

• External source of data
• Ernst Erb

• Source of data
• The Radio Collector's Directory and Price Guide 1921 - 1965

• Circuit diagram reference
• Rider's Perpetual, Volume 11 = ca. 1940 and before

• Other Models

• Here you find 401 models, 163 with images and 321 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Automatic Radio Mfg. Co.; Boston (MA)