• Country
• United States of America (USA)

• Manufacturer / Brand
• Masco Mark Simpson Company Inc., Long Island

• Year
• 1953 ?

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 365806

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

• Number of Tubes
• 9

• Valves / Tubes
• 12AX7 12AU7 12AU7 6SJ7 6SJ7 6L6G 6L6G 5V4G 5V4G

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 60Hz, 117V=110-120 Volt

• Loudspeaker
• - This model requires external speaker(s).

• Material
• Metal case

• from Radiomuseum.org
• Model: CM-20, PR-1 - Masco Mark Simpson Company Inc

• Shape
• Chassis only or for «building in»

• Notes

• Masco model CM-20, PR-1 is an AC operated 20 watt audio amplifier with remote pre-amplifier.

• Literature/Schematics (2)
• Photofact Folder, Howard W. SAMS (Set 218, folder 6, dated 10-53)

• Author
• Model page created by Dirk Taekels. See "Data change" for further contributors.

• Other Models

• Here you find 154 models, 123 with images and 125 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Masco Mark Simpson Company Inc., Long Island