• Country
• Germany

• Manufacturer / Brand
• Stern-Radio Leipzig, VEB, - vorm. Opta-Radio AG (Ostd.)

• Year
• 1949

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 327367

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

• Number of Tubes
• 8

• Valves / Tubes
• EF12 EF12 EF12 EF12 EL12 EL12 AZ12 AZ12

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 110; 125; 150; 220; 240 Volt

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

• Material
• Metal case

• from Radiomuseum.org
• Model: 25-Watt-Kraftverstärker Opta 3523 [1949] - Stern-Radio Leipzig, VEB, -

• Dimensions (WHD)
• 520 x 190 x 335 mm / 20.5 x 7.5 x 13.2 inch

• Notes

• NF-Verstärker mit 4 umschaltbaren Eingängen. Erste Ausführung 1947 als Variante A mit AD1/400, auch gebaut für russische Abnehmer (Reparationsleistung) mit anderer Röhrenbestückung als Variante B. 

  Herstellerbezeichnung Stern-Radio Leipzig, VEB..

• Net weight (2.2 lb = 1 kg)
• 20 kg / 44 lb 0.8 oz (44.053 lb)

• Mentioned in
• - - Manufacturers Literature

• Author
• Model page created by Wolfgang Eckardt. See "Data change" for further contributors.

• Other Models

• Here you find 23 models, 14 with images and 12 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Stern-Radio Leipzig, VEB, - vorm. Opta-Radio AG (Ostd.)