• Country
• United States of America (USA)

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

• Year
• 1959

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 72108

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

• Number of Tubes
• 4

• Valves / Tubes
• 1R5 1U4 1DN5 3V4

• Number of Transistors

• Semiconductors
• Selenium-Rectifier

• 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 110-120 / 90 & 7.5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4 cm = 1.6 inch

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: 5P21B Ch= HS-633 - Motorola Inc. ex Galvin Mfg.Co

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

• Notes
• The Motorola Model 5P21B is a Three Power operated Portable AM Receiver.

• Circuit diagram reference
• Beitman Radio Diagrams Vol. 19, 1959

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Date 2-59, Set 431, Folder 15)

• Author
• Model page created by Hinrich Grensemann † 15.5.16. See "Data change" for further contributors.

• Other Models

• Here you find 4596 models, 2962 with images and 4095 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)