• Country
• United States of America (USA)

• Manufacturer / Brand
• Motorola Inc. (ex Galvin Mfg.Co. Chicago); Schaumburg (IL)

• Year
• 1955 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 81644

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

• Number of Tubes
• 4

• Valves / Tubes
• 1R5 1U4 1U5 3V4

• 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
• Line / Batteries (any type) / AC/DC 117=110-120/ 3 & 90 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4 inch = 10.2 cm

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: 55J1 Ch=HS-454 - Motorola Inc. ex Galvin Mfg.Co

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

• Notes

• Motorola model 55J1 is a three power portable AM superheterodyne receiver. 1xSelenium rectifier; color=black. Sams photofact, set 301, folder 7, date 12-55, features the Motorola models 55J1, and 55J2 as the same schematic. The difference is only the color.

• Circuit diagram reference
• Beitman Radio Diagrams Vol. 16, 1956

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Set 301 folder 7 date 12-55)

• Author
• Model page created by Egon Penker. See "Data change" for further contributors.

• Other Models

• Here you find 4607 models, 2964 with images and 4106 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Motorola Inc. (ex Galvin Mfg.Co. Chicago); Schaumburg (IL)