• Country
• Germany

• Manufacturer / Brand
• Messgerätewerk Zwönitz, VEB; Zwönitz (Ostd.)

• Year
• 1957/1958

• Category
• Sound/Video Recorder and/or Player

• Radiomuseum.org ID
• 77677

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

• Number of Tubes
• 4

• Valves / Tubes
• EF86 ECC81 EL84 EM11

• Number of Transistors

• Semiconductors
• Tr.Gl.=Metal-rectif.

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Details
• Tape Recorder

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

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) - elliptical

• Power out
• 1.5 W (unknown quality)

• Material
• Leather / canvas / plastic - over other material

• from Radiomuseum.org
• Model: Smaragd BG20/1 - Messgerätewerk Zwönitz, VEB;

• Shape
• Tablemodel, low profile (big size).

• Dimensions (WHD)
• 435 x 225 x 350 mm / 17.1 x 8.9 x 13.8 inch

• Notes
• Doppelspurgerät, nur 19,05 cm/s; 60-12000 Hz. Wie Grundgerät BG20, mit Verbesserungen: Bandzähluhr, Tonblende und Tricktaste. 18-cm-Spulen. Koffer aus Sperrholz mit Kunstleder überzogen, Bakelit-Abdeckung. Auch als Einbau-Chassis im Handel (390 × 160 × 278 mm).

• Net weight (2.2 lb = 1 kg)
• 18 kg / 39 lb 10.4 oz (39.648 lb)

• Price in first year of sale
• 1,050.00 DM

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Mentioned in
• -- Original-techn. papers. (Radio und Fernsehen 5/58)

• Literature/Schematics (1)
• -- Collector info (Sammler) (Funkverlag Hein, Service-CD)

• Author
• Model page created by a member from D. See "Data change" for further contributors.

• Other Models

• Here you find 70 models, 62 with images and 47 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Messgerätewerk Zwönitz, VEB; Zwönitz (Ostd.)