• Country
• United States of America (USA)

• Manufacturer / Brand
• Motiograph; Chicago, ILL.

• Year
• 1941 ??

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 343454

• Number of Tubes
• 6

• Valves / Tubes
• 6SJ7 6SJ7 6L6 6L6 5U4G 6K6

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 105; 115; 125 Volt

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

• Material
• Metal case

• from Radiomuseum.org
• Model: Amplifier MA-7515-A - Motiograph; Chicago, ILL.

• Shape
• Boatanchor (heavy military or commercial set >20 kg).

• Notes

• Theater power amplifier, with tube monitoring meter.

• Author
• Model page created by Gottfried Silberhorn. See "Data change" for further contributors.

• Other Models

• Here you find 2 models, 2 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Motiograph; Chicago, ILL.