radiomuseum.org

Sonra Sekretär III 697/62GWU

Sonra Sekretär III 697/62GWU; Stern-Radio (ID = 103668) Radio
 
Sonra Sekretär III 697/62GWU; Stern-Radio (ID = 512959) Radio
 
Sonra Sekretär III 697/62GWU; Stern-Radio (ID = 512960) Radio
 
Sonra Sekretär III 697/62GWU; Stern-Radio (ID = 572716) Radio
 
Sonra Sekretär III 697/62GWU; Stern-Radio (ID = 512961) Radio
 
Sonra Sekretär III 697/62GWU; Stern-Radio (ID = 512962) Radio
Sonra Sekretär III 697/62GWU; Stern-Radio (ID = 1607268) Radio Sonra Sekretär III 697/62GWU; Stern-Radio (ID = 233667) Radio
Sonra Sekretär III 697/62GWU; Stern-Radio (ID = 233668) Radio Sonra Sekretär III 697/62GWU; Stern-Radio (ID = 1607270) Radio
Sonra Sekretär III 697/62GWU; Stern-Radio (ID = 61972) Radio Sonra Sekretär III 697/62GWU; Stern-Radio (ID = 233666) Radio
Sonra Sekretär III 697/62GWU; Stern-Radio (ID = 365253) Radio Sonra Sekretär III 697/62GWU; Stern-Radio (ID = 1607269) Radio
Altre immagini: scorri con la barra rossa.
Sonra Sekretär III 697/62GWU; Stern-Radio (ID = 1607268) Radio
Stern-Radio: Sonra Sekretär III 697/62GWU [Radio] ID = 1607268 800x600
Seleziona le anteprime di foto e schemi a destra per ingrandirle, e clicca qui sopra per il download.
For model Sonra Sekretär III 697/62GWU, Stern-Radio Sonneberg, VEB, RFT; SONRA; -vorm.: EAK (Ostd.) - ex. AEG
 
Paese:  Germania
Produttore / Marca:  Stern-Radio Sonneberg, VEB, RFT; SONRA; -vorm.: EAK (Ostd.) - ex. AEG
Anno: 1958/1959 perfect model Categoria: Radio (o sintonizzatore del dopoguerra WW2)
Valvole 6: UCC85 UCH81 UABC80 UBF89 UM80 UL84
Semiconduttori (transistor solo contati) Tr.Gl.=Metal-rectif.
Principio generale Supereterodina (in generale); ZF/IF 473/10700 kHz
N. di circuiti accordati 6 Circuiti Mod. Amp. (AM)     9 Circuiti Mod. Freq. (FM)
Gamme d'onda Onde medie (OM), lunghe (OL) e MF (FM).
Particolarità
Tensioni di funzionamento Alimentazione universale (doppia: CC/CA) / 220 Volt
Altoparlante AP magnetodinamico ellittico (magnete permanente e bobina mobile). / Ø 22 cm = 8.7 inch
Potenza d'uscita 2 W (qualità ignota)
Radiomuseum.org Modello: Sonra Sekretär III 697/62GWU - Stern-Radio Sonneberg, VEB,
Materiali Mobile in legno
Forma Soprammobile con pulsantiera/tastiera.
Dimensioni (LxAxP) 570 x 315 x 190 mm / 22.4 x 12.4 x 7.5 inch
Annotazioni

Der Super Sekretär III 697/62 ist ein Allstromgerät mit 4 Tasten. TA- Betrieb ist deshalb nur über einen Trenntrafo möglich.
Ab Ende 1957 bis Anfang 1960 Verwendung des Markenzeichen "SONRA" auf den Rückwänden, Skalen und auf den Gehäusefronten.

Peso netto 7.5 kg / 16 lb 8.3 oz (16.52 lb)
Prezzo nel primo anno 400.00 DM
Fonte dei dati Radiokatalog Band 2, Ernst Erb
Bibliografia Die Geschichte der Rundfunkindustrie der DDR Band 1 1945 - 1967
Letteratura / Schemi (1) Service-DVD Funkverlag B. Hein

Modello inviato da Peter Edgar Kirchhof. Utilizzare "Proponi modifica" per inviare ulteriori dati.



Elenco delle radio e altri apparecchi della Stern-Radio Sonneberg, VEB, RFT; SONRA; -vorm.: EAK (Ostd.) - ex. AEG
In questo link sono elencati 383 modelli, di cui 305 con immagini e 279 con schemi.




 


Discussioni nel forum su questo modello
Stern-Radio: Sonra Sekretär III 697/62GWU
Argomenti: 1 | Articoli: 3
Visite: 1655     Risposte: 2
stern-sonn: 697/62GWU (697/62 GWU); Sekretär III
Timo Haveri
31.Jan.10
  1

Hello. I have a problem with my Sekretär III radio. The FM doesn't work well when using the radio's own antenna. There is a lot of squealing and interference noise, especially in the higher frequency end of the scale. My theory is that the radio frequencies are coupled back into the antenna from the FM-section due to (originally) poor or weakened shielding somewhere. If I connect only one pin of the dipole-antenna or use just one wire as an external antenna the radio works quite well with only an occasional little squeal at some spots of the dial during tuning. Using it like that, normal listening is not affected very much so it is something that can be lived with. However, I would like to hear if someone else has experienced similar behaviour in their Sekretär radios or other models. Also if there is a way to fix the problem, I would appreciate your suggestions.

Timo

Konrad Birkner † 12.08.2014
26.Jul.10
  2

I put a German translation in a separate thread now.

Kobi

Konrad Birkner † 12.08.2014
27.Jul.10
  3

I got a suspicion: Neutralisation of the Tuner input triode. It is materialized by a 2.5 pF cap (C5). That might be off from the optimal value.

Other tuner constructions applied mostly a small trimmer cap for the purpose.

Jens Dehne told me that he would remember something alike from past experience. He made a photo of C5 location and we can look how to replace the part by a variable one. Care must be taken in such high frequency circuits, not to spoil their function by alterations to connections or wiring. Everything has an influence at 100 MHz what would be harmless in the BC band.

The UCC85 base has  C5 connected from pin 6 to 8.

It might have lost contact between wire and cap (even inside).
First of all unsolder one end and watch what will happen.

Without a dramatic change in FM behaviour I would say, C5 is defect.
Anyway try to replace it by a suitable Trimmer. If not at hand use some capacity close to 2.5 pF. Vary by 0.5 to 1 pF up and down.

 

Good luck!

 

 
Stern-Radio: Sonra Sekretär III 697/62GWU
Fine delle discussioni nel forum su questo modello

  
rmXorg