• Country
• United States of America (USA)

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

• Year
• 1958

• Category
• Sound/Video Recorder and/or Player

• Radiomuseum.org ID
• 72182

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

• Number of Tubes
• 5

• Valves / Tubes
• 12AX7 12AX7 EL84 EL84 5Y3GT

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Details
• Rec.Player+Audio.Amp+LS

• Power type and voltage
• Alternating Current supply (AC) / 120 Volt

• Loudspeaker
• 5 Loudspeakers

• Power out
• 4 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: SK21M Ch= HS-735 - Motorola Inc. ex Galvin Mfg.Co

• Shape
• Console, Lowboy (legs < 50 %).

• Notes
• The Motorola Model SK21M is an AC operated 5 Tube stereo Phono Amplifier with 4 Speed Automatic Record Changer. Uses chassis HS-735. Cabinet is Mahogany. This model has Qty(1) 12" PM speaker, Qty(2) PM 6" speakers and Qty(2) 4" PM speakers. Uses Record Changer BR3RC. Two cabinets make up this model, with the second cabinet holding the right channel speakers (S21M).

• Source of data
• Beitman Radio Diagrams, Vol. 19, 1959

• Literature/Schematics (1)
• - - Manufacturers Literature

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

• Other Models

• Here you find 4508 models, 2955 with images and 4002 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)