• 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
• 81645

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

• Number of Tubes
• 5

• Valves / Tubes
• 12BE6 12BA6 12AV6 50C5 35W4

• 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
• AC/DC-set / 117 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: 56R4 Ch= HS-487 - Motorola Inc. ex Galvin Mfg.Co

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

• Notes

• Beitman R-16 shows the following models for this schematic: chassis HS-431 for the four models: 56H1 Mahogany, 56H2 White, 56H3 Green and 56H4 Turquoise. They are otherwise exactly the same, having a big center knob and two small knobs far on the edges on the same hight.
  
  But this chassis HS-487 with the same schematic was used for quite a different cabinet with two knobs besides each other just above the feet. See the pictures. The HS-487 chassis was used for the models 56R1 Ebony, 56R2 White, 56R3 Red and 56R4 in Green.
  This model is in color Green.
  
  AC-DC Operated AM Superheterodyne Receiver.

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

• Literature/Schematics (1)
• Table Top Radios Vol. 1 Stein 98 (page 118.)

• Literature/Schematics (2)
• Photofact Folder, Howard W. SAMS (Set 320 folder 10 dated 6-56)

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

• Other Models

• Here you find 4509 models, 2955 with images and 4003 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)