• Country
• United States of America (USA)

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

• Year
• 1946 ?

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 184660

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

• Number of Tubes
• 7

• Valves / Tubes
• 7B4 7B4 7N7 7N7 6L6GA 6L6GA 5U4G

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 117 Volt

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

• Material
• Metal case

• from Radiomuseum.org
• Model: Masco MA-25 - Masco Mark Simpson Company Inc

• Shape
• Tablemodel, with any shape - general.

• Notes

• 3 channel PA amplifier.

• Literature/Schematics (4)
• Photofact Folder, Howard W. SAMS (Set 16, Date 3/47, Folder 476-24)

• Author
• Model page created by Ernst Erb. See "Data change" for further contributors.

• Other Models

• Here you find 136 models, 104 with images and 107 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