• Country
• Germany

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

• Year
• 1960/1961

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 73054

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

• Number of Tubes
• 6

• Valves / Tubes
• UCC85 UCH81 UBF89 UABC80 UM80 UL84

• Number of Transistors

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

• Main principle
• Superheterodyne (common); ZF/IF 455/10700 kHz

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

• Wave bands
• Broadcast, Short Wave plus FM or UHF.

• Power type and voltage
• AC/DC-set / 220 Volt

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

• Power out
• 2 W (unknown quality)

• Material
• Bakelite case

• from Radiomuseum.org
• Model: Sonra Sekretär 4 697/77GWU - Stern-Radio Sonneberg, VEB,

• Shape
• Tablemodel with Push Buttons.

• Notes

• Pressstoffvariante des Sekretär 4 697/76GWU. Chassis identisch.

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Mentioned in
• - - Manufacturers Literature

• Literature/Schematics (1)
• Service-DVD Funkverlag Hein

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

• Other Models

• Here you find 385 models, 311 with images and 287 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