• Country
• Germany

• Manufacturer / Brand
• Stern-Radio Sonneberg, VEB, RFT; SONRA; -vorm.: EAK (Ostd.) - ex. AEG

• Year
• 1957–1959

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 221431

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

• Number of Tubes
• 6

• Valves / Tubes
• ECC85 ECH81 EBF80 EAA91 EM80 ECL81

• Number of Transistors

• Semiconductors
• Selenium-Rectifier

• Main principle
• Superheterodyne (common); ZF/IF 473/10700 kHz

• Tuned circuits
• 6 AM circuit(s)     9 FM circuit(s)

• Wave bands
• Broadcast, Long Wave and FM or UHF.

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

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

• Material
• Wooden case

• from Radiomuseum.org
• Model: Sonneberg Sekretär 697/57WU - Stern-Radio Sonneberg, VEB,

• Shape
• Tablemodel with Push Buttons.

• Dimensions (WHD)
• 485 x 320 x 190 mm / 19.1 x 12.6 x 7.5 inch

• Notes

• Das gleiche Modell mit identischem Chassis und Gehäuse wird auch auf der Gehäusefront mit der Beschriftung SONRA, dem Markennamen, ausgeliefert ( Sonra Sekretär 697/57WU).

  Nur Trafo für Heizspannung, keine Netztrennung !!!

  .

• Literature/Schematics (1)
• -- Original-techn. papers.

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

• Other Models

• Here you find 386 models, 313 with images and 288 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Stern-Radio Sonneberg, VEB, RFT; SONRA; -vorm.: EAK (Ostd.) - ex. AEG