500

Centrum-Radio, Gylling & Co.; Stockholm

Dati
Forum
Immagini
Collezioni

  • Anno
  • 1958 ?
  • Categoria
  • Autoradio, eventualmente con registratore a cassette o giradischi
  • Radiomuseum.org ID
  • 353179
    • Brand: Gylling

Clicca sulla miniatura dello schema per richiederlo come documento gratuito.

 Specifiche tecniche

  • Numero di tubi
  • 4
  • Numero di transistor
  • 2
  • Principio generale
  • Supereterodina (in generale); ZF/IF 450 kHz
  • N. di circuiti accordati
  • 7 Circuiti Mod. Amp. (AM)
  • Gamme d'onda
  • Onde medie (OM) e onde lunghe (OL).
  • Tensioni di funzionamento
  • Batteria di accumulatori, per tutto (es. autoradio, radio amatoriali) / 6 or 12 Volt
  • Altoparlante
  • - Questo apparecchio richiede altoparlante/i esterno/i.
  • Materiali
  • Mobile di metallo
  • Radiomuseum.org
  • Modello: 500 - Centrum-Radio, Gylling & Co.;
  • Forma
  • Chassis o in scatola da montaggio
  • Annotazioni

  • The "Centrum 500" is a car radio designed and built circa 1958 by Gylling & Co. in Stockholm, Sweden. It is the successor of the Centrum 100 from around 1952. 

    The 500 is a quirky design. It is MW and LW only. FM was taking over in Europe, but not popular in Sweden. 

    The 500 could operate on 6 or 12 V and plus or minus ground. It is a hybrid design with four tubes and two transistors. The tubes operate on 6.3 V (filament) and 12 V (anode). The ECH 83 is the mixer and local oscillator. The EF 97 pentode is the first 450 kHz IF. The EBF 83 is the second IF and demodulator. The first audio stage is a cathode follower connected as a triode, EF 98.  Audio output is a OC604spez germanium transistor (driver), and a 2N242 germanium transistor is the approximate 2 W output transistor. 

    To operate 12 V tubes on 6 V, the 6 V supply is connected in series with a set of button cell batteries raising the anode supply to 12 V.  When the radio is switched off, the car 6 V battery charges the button cells. 6/12 V change over is by a plug in small PCB where the four 1.5 V  cells  are mounted. 

    The build quality was poor and a typical last effort from an already struggling manufacturer.
     

  • Letteratura / Schemi (1)
  • -- Schematic
  • Autore
  • Modello inviato da David Erali. Utilizzare "Proponi modifica" per inviare ulteriori dati.

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