Synthesized Stereo Tuner ST-50

Marantz (Sound United LLC); Vista, CA

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  • Year
  • 1990 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 161972

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Main principle
  • PLL, Phase-locked loop
  • Wave bands
  • Broadcast (BC) and FM or UHF.
  • Details
  • Radio Control (+Remote Wire etc)
  • Power type and voltage
  • Alternating Current supply (AC) / 110; 120; 220; 240 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Synthesized Stereo Tuner ST-50 - Marantz Sound United LLC;
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 420 x 86 x 334 mm / 16.5 x 3.4 x 13.1 inch
  • Notes

  • A 2 band synthesized stereo hi-fi AM/FM tuner with a digital display covering FM and MW, with D-BUS remote control. RCA sockets for line output and remote input/output, coax socket for 75ohm FM aerial and terminals for AM aerial.  Memory for 30 preset radio stations, FM IF Wide/Narrow switch, keys for tuning up/down, mono/stereo and frequency direct access tuning, 

    Specification  
    FM Stage 87.5-108 MHz
    Sensitivity  
      DIN mono (s/n 26dB 75Ω) 0.7µV
      DIN stereo (s/n 46dB 75Ω) 20µV
    Selectivity adjacent channel 98MHz  
      Wide IF
      Narrow IF    		 40dB
    75dB
    Tuner output (1kHz 75kHz Deviation) 940mV
    Signal to noise ratio  
      S/N DIN weighted mono
      S/N DIN weighted stereo    		 86dB
    78dB
    Total harmonic distortion mono
       Wide IF
       Narrow IF
    0.05%
    0.15%
     Total harmonic distortion stereo
       Wide IF
       Narrow IF
    0.08%
    0.3%
     Accuracy of frequency response
       across 30Hz-15kHz bandwidth    		 +0.5/-1.5dB
    Stereo separation
       Wide IF
       Narrow IF
    55dB
    50dB
    MW Stage 531-1602 kHz
    Sensitivity (s/n 20dB 30% mod. 1 MHz) 350µV
    Selectivity 1MHz 9kHz 40dB
    Signal to noise ratio at 1MHz 54dB

    Versions/Power Requirements
    N and W/T versions  /  220/240V AC, 50/60 Hz
    E version   /  110-120/220-240V AC, 50/60 Hz with voltage selector

    See also the US market Marantz ST-50 ST-50U Synthesized Stereo Tuner. Same as the 3 band Marantz ST-50L Synthesized Stereo Tuner which additionally has LW.

  • Net weight (2.2 lb = 1 kg)
  • 4.5 kg / 9 lb 14.6 oz (9.912 lb)
  • Mentioned in
  • -- Original prospect or advert (1990 Marantz Not For The Casual Listener catalogue)
  • Literature/Schematics (1)
  • - - Manufacturers Literature (Service Manual ST-50/ST-50L)
  • Author
  • Model page created by Franz Scharner. See "Data change" for further contributors.

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