Supro 21
National Dobro Co.; San Louis
- Country
- United States of America (USA)
- Manufacturer / Brand
- National Dobro Co.; San Louis
- Year
- 1938 ?
- Category
- Audio Amplifier or -mixer
- Radiomuseum.org ID
- 184885
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 4
- 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) / Ø 6 inch = 15.2 cm
- Power out
- 6 W (unknown quality)
- Material
- Leather / canvas / plastic - over other material
- from Radiomuseum.org
- Model: Supro 21 - National Dobro Co.; San Louis
- Shape
- Tablemodel, low profile (big size).
- Dimensions (WHD)
- 780 x 240 x 170 mm / 30.7 x 9.4 x 6.7 inch
- Notes
- Musical instrument amplifier with lapsteel guitar in case.
- Net weight (2.2 lb = 1 kg)
- 14.8 kg / 32 lb 9.6 oz (32.599 lb)
- 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