• Year
  • 1959/1960
  • Category
  • Sound/Video Recorder and/or Player
  • Radiomuseum.org ID
  • 78039

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

 Technical Specifications

  • Number of Tubes
  • 3
  • Number of Transistors
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Details
  • Tape Recorder
  • Power type and voltage
  • Alternating Current supply (AC) / 110-240 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) - elliptical
  • Power out
  • 1.5 W (unknown quality)
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: Smaragd BG20/4 - 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, umschaltbar 19,05/9,53 cm/s mit 60-15000/60-10000 Hz. Weiterentwicklung des BG20/3. 18-cm-Spulen, Bandzähluhr, Tonblende, Tricktaste (Löschunterbrechung). Koffer aus Sperrholz mit Kunstleder überzogen, Bakelit-Abdeckung. Auch als Einbauchassis 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
  • 1,110.00 DM
  • Source of data
  • Radiokatalog Band 2, Ernst Erb
  • Mentioned in
  • -- Original-techn. papers. (Radio und Fernsehen 5/58 und 11/59)
  • Literature/Schematics (1)
  • -- Collector info (Sammler) (Funkverlag Hein, Service-CD)
  • Author
  • Model page created by Wolfgang Eckardt. See "Data change" for further contributors.

 Collections | Museums | Literature

 Forum

Forum contributions about this model: Messgerätewerk: Smaragd BG20/4

Threads: 1 | Posts: 2

Question about RFT Smaragd BG 20-4 recorder   1

Hello!
I have a problem with the record/play head shield plate in the front of the head. It does not open when recorder is not in play-mode. It seems as a missing spring of some kind...?
Can anybody give me a tip how it should works?
See picture down here!
Thanks
/Lennart Schander

Lennart Schander, 09.Sep.05

Weitere Posts (2) zu diesem Thema.