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
Utilice la barra deslizante rojo por más.
Sonra Sekretär III 697/62GWU; Stern-Radio (ID = 1607268) Radio
Stern-Radio: Sonra Sekretär III 697/62GWU [Radio] ID = 1607268 800x600
Seleccione una imagen o esquema para mostrar las miniaturas de la derecha y haga clic para descargar.
For model Sonra Sekretär III 697/62GWU, Stern-Radio Sonneberg, VEB, RFT; SONRA; -vorm.: EAK (Ostd.) - ex. AEG
 
País:  Alemania
Fabricante / Marca:  Stern-Radio Sonneberg, VEB, RFT; SONRA; -vorm.: EAK (Ostd.) - ex. AEG
Año: 1958/1959 perfect model Categoría: Radio - o Sintonizador pasado WW2
Válvulas 6: UCC85 UCH81 UABC80 UBF89 UM80 UL84
Semiconductores (sólo se cuentan los transistores) Tr.Gl.=Metal-rectif.
Principio principal Superheterodino en general; ZF/IF 473/10700 kHz
Número de circuitos sintonía 6 Circuíto(s) AM     9 Circuíto(s) FM
Gama de ondas OM, OL y FM
Especialidades
Tensión de funcionamiento Red: Aparato AC/DC. / 220 Volt
Altavoz Altavoz elíptico de imán permanente. / Ø 22 cm = 8.7 inch
Potencia de salida 2 W (unknown quality)
de Radiomuseum.org Modelo: Sonra Sekretär III 697/62GWU - Stern-Radio Sonneberg, VEB,
Material Madera
Forma Sobremesa de botonera.
Ancho, altura, profundidad 570 x 315 x 190 mm / 22.4 x 12.4 x 7.5 inch
Anotaciones

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 neto 7.5 kg / 16 lb 8.3 oz (16.52 lb)
Precio durante el primer año 400.00 DM
Procedencia de los datos Radiokatalog Band 2, Ernst Erb
Mencionado en Die Geschichte der Rundfunkindustrie der DDR Band 1 1945 - 1967
Documentación / Esquemas (1) Service-DVD Funkverlag B. Hein

Modelo creado por Peter Edgar Kirchhof. Ver en "Modificar Ficha" los participantes posteriores.



Ir al listado general de Stern-Radio Sonneberg, VEB, RFT; SONRA; -vorm.: EAK (Ostd.) - ex. AEG
Donde encontrará 383 modelos, 308 con imágenes y 281 con esquemas.




 


Contribuciones en el Foro acerca de este modelo
Stern-Radio: Sonra Sekretär III 697/62GWU
Hilos: 1 | Mensajes: 3
Entradas: 1712     Réplicas: 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
Fin de las contribuciones al foro de modelo

  
rmXorg