Audio Current Transfer FM Stereo Tuner ST-S555ES

Sony Corporation; Tokyo

  • Year
  • 1983–1987
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 225250

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Main principle
  • PLL, Phase-locked loop; ZF/IF 10700 kHz
  • Wave bands
  • FM Broadcast Band Only
  • Details
  • Hi-Fi equipment
  • Power type and voltage
  • Alternating Current supply (AC) / 120; 220; 240 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Audio Current Transfer FM Stereo Tuner ST-S555ES - Sony Corporation; Tokyo
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 430 x 80 x 340 mm / 16.9 x 3.1 x 13.4 inch
  • Notes
  • A hi-fi FM stereo quartz lock digital synthesizer tuner with a digital frequency FL display housed in a metal case with optional wooden side panels. Features Direct Comparator Technology and an Audio Current Transfer (ACT) circuit. With a 10 step Signal Strength indicator, Automatic tuning, Manual tuning, Memory preset tuning (8 AM or FM radio stations), a Program Function, the SCAN/READ button which scans through all the preset radio stations playing each one for 10 seconds, push button switches for Wide and Narrow IF Bandwidth, Hi-Blend, Muting, Mode, Antenna selection (A or B), and a Calibration Tone button which produces a 400Hz, 50% mod. signal for calibrating the recording level on a tape deck. Two FM antennae terminals (A and B) and an ACT output connector (a special ACT cable is supplied for connecting the tuner to an amplifier).

    Specification  
    FM tuner section  
    Tuning range 87.5MHz - 108MHz
    Antenna terminals two, 75Ω unbalanced
    At 40kHz deviation  
     Sensitivity at 46dB quieting 2µV (mono), 22.5µV (stereo)
     Usable sensitivity 0.8µV (S/N = 26dB)
     Signal/Noise ratio 86dB (mono), 80dB (stereo)
     Frequency response 40Hz - 12.5kHz ±0.2dB
    30Hz - 15kHz +0.2dB,-0.5dB
    At 75kHz deviation  
     Sensitivity at 50dB quieting 16.8dBf, 1.8µV (mono), 37.9dBf, 22.5µV (stereo)
     Usable sensitivity 10.3dBf, 0.9µV (IHF)
     Signal/Noise ratio 92dB (mono), 86dB (stereo)
     Frequency response 30Hz - 15kHz +2dB,-0.5dB
    Harmonic distortion WIDE 0.03% (mono), 0.05% (stereo) at 100Hz
    NARROW 0.05% (mono), 0.07% (stereo) at 100Hz
    IM distortion WIDE 0.03% (mono), 0.04% (stereo)
    Separation WIDE 55dB at 100Hz
    Selectivity  
     at 300kHz
     at 400kHz
    30dB (WIDE), 57dB (NARROW)
    60dB (WIDE), 90dB (NARROW)
    Capture ratio 1.0dB
    AM suppression ratio 65dB
    Image response ratio 120dB
    IF response ratio 100dB
    Spurious response ratio 120dB
    Muting threshold Approx. 25dBf, 5µV
    Auto-tuning threshold Approx. 25dBf, 5µV
    Output level/impedance
    (75kHz deviation)
    750 mV, 620Ω, transformed by the supplied ACT cable
    Calibrating tone level 50% modulation (37.5kHz deviation), 400Hz
    Antenna B attenuator 20dB

    Versions/Power requirements
    AEP model / 220V AC 50/60Hz internally adjustable to 240V AC
    US model / 120V AC 60Hz
    Canadian model / 120V AC 60Hz

    Power consumption 25 watts (AEP model), 23 watts (US and Canadian models).

    The US and Canadian models weigh 4.8kg.

  • Net weight (2.2 lb = 1 kg)
  • 4.9 kg / 10 lb 12.7 oz (10.793 lb)
  • Source of data
  • -- Original prospect or advert
  • Mentioned in
  • -- Original prospect or advert (1987 Die Sony ES-Linie katalog)
  • Literature/Schematics (1)
  • - - Manufacturers Literature (Service manual ST-S555ES dated 1983)

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