604-S

RIZ, Radio Industrija Zagreb; Zagreb

Datos
Foro
Imágenes
Colecciones

  • Año
  • 1960
  • Categoría
  • Radio - o Sintonizador pasado WW2
  • Radiomuseum.org ID
  • 205919
    • alternative name: Radioindustrija Zabreb

 Especificaciones técnicas

  • Numero de valvulas
  • 11
  • Principio principal
  • Superheterodino en general; ZF/IF ?/10700 kHz
  • Gama de ondas
  • OM, OL, OC y FM
  • Tensión de funcionamiento
  • Red: Corriente alterna (CA, Inglés = AC) / 110/220 Volt
  • Altavoz
  • 4 Altavoces
  • Potencia de salida
  • 10 W (unknown quality)
  • Material
  • Madera
  • de Radiomuseum.org
  • Modelo: 604-S - RIZ, Radio Industrija Zagreb;
  • Forma
  • Sobremesa apaisado (tamaño grande).
  • Ancho, altura, profundidad
  • 650 x 360 x 290 mm / 25.6 x 14.2 x 11.4 inch
  • Anotaciones
  • Stereo AF amplifier 2 x 5 W. Similar to model 604. Four oval loudspeakers.
  • Peso neto
  • 17 kg / 37 lb 7.1 oz (37.445 lb)
  • Documentación / Esquemas (1)
  • Opravka radio aparata / V. Mesaroš, 1965
  • Autor
  • Modelo creado por Danko Tkalec. Ver en "Modificar Ficha" los participantes posteriores.

 Colecciones | Museos | Literatura

 Forum

Contribuciones en el Foro acerca de este modelo: RIZ, Radio: 604-S

Hilos: 1 | Mensajes: 18

A few years ago, I’ve tried to upgrade one of my great valve radios to be a full stereo device.

It was some kind of Grundig set, license produced in my country, with 11 valves, two separate channels with two output transformers with EL84-s.

I was thinking about possibility to make them a full stereo, putting inside a stereo decoder.

I have use a MC1310 chip, put whole construction in old screening IF transformer can, because chip is very small and don’t look so odd on chassis.

Thing works, but never give a good quality stereo sound.

A stereo indication lamp glows even on weaker stations, but sound is a little distorted, and stereo effect is poor.

My thoughts are that MC1310 isn’t so bad quality chip, like are my results in this project.

Probably something missing in this project, like signal level adjustment in and out of the decoder, some kind of output filtering etc. ; something what  good quality sets have calculated in factory production.

Is anyone of you tried to do something like this, and what were the results?

Sorry I can’t write German, but I know read and understand them, so any comment is welcome.

Here is a schematic diagram, red lines shows like I’ve connect a decoder.

Best regards.

Anexos

Berislav Bradaric, 26.Dec.11

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