• Country
• United States of America (USA)

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

• Year
• 1947

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 136543

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

• Number of Tubes
• 6

• Valves / Tubes
• 6SJ7 6SL7 6SL7 6L6 6L6 5U4

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 110 - 120 Volt

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

• Material
• Metal case

• from Radiomuseum.org
• Model: MA-20HF - Masco Mark Simpson Company Inc

• Shape
• Tablemodel, low profile (big size).

• Notes
• The Masco Modell MA-20HF is an AC Operated Six Tube Push-Pull Amplifier.

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Date 11-47, Set 28, Folder 4718-21)

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

• Other Models

• Here you find 130 models, 103 with images and 101 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