• Country
• United States of America (USA)

• Manufacturer / Brand
• National Dobro Co.; San Louis

• Year
• 1938

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 184112

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

• Number of Tubes
• 7

• Valves / Tubes
• 6N7 6N7 6N7 6N7 6L6 6L6 5V4

• Main principle
• Audio-Amplification

• Wave bands
• - without

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

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil)

• Power out
• 20 W (unknown quality)

• from Radiomuseum.org
• Model: Model B - National Dobro Co.; San Louis

• Notes
• Musical Instrument Amplifier.

• Author
• Model page created by Hannes Gerber. See "Data change" for further contributors.

• Other Models

• Here you find 13 models, 2 with images and 12 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from National Dobro Co.; San Louis