• Country
• Switzerland

• Manufacturer / Brand
• Carma, Präzisionswerkstätte; Winterthur

• Year
• 1927/1928 ?

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 11801

• Number of Tubes
• 2

• Valves / Tubes
• NA420L NA420L

• Main principle
• Audio-Amplification

• Power type and voltage
• Storage and/or dry batteries

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case, TUBES VISIBLE.

• from Radiomuseum.org
• Model: Push-Pull 213 - Carma, Präzisionswerkstätte;

• Notes
• Kraftverstärker

• Price in first year of sale
• 120.00 SFr !

• External source of data
• E. Erb 3-907007-36-0

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Other Models

• Here you find 17 models, 6 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Carma, Präzisionswerkstätte; Winterthur