AM/FM Stereo Tuner ST-7E / ST-7 Australia

Nakamichi Co.; Tokyo

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  • Year
  • 1987–1989
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 146929

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Main principle
  • PLL, Phase-locked loop
  • Wave bands
  • Broadcast (BC) and FM or UHF.
  • Details
  • Remote Control (with wire or wireless)
  • Power type and voltage
  • Alternating Current supply (AC) / 120; 220; 240 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: AM/FM Stereo Tuner ST-7E / ST-7 Australia - Nakamichi Co.; Tokyo
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 435 x 63 x 289 mm / 17.1 x 2.5 x 11.4 inch
  • Notes

  • A hi-fi AM/FM stereo synthesizer tuner with a digital frequency display housed in a black metallic case. Provision for system wired remote control. With Schotz Noise Reduction circuit, Memory for 16 FM and MW stations, switches for FM Mute and Mode (mono/stereo). AM loop antenna, 2 terminals for FM antennae, terminals for AM antennae, connection for System Remote control, RCA phono Line Output sockets with output level adjusters.

    AM/FM-Synthesizer-Tuner mit Schotz-Schaltkreis (Noise Reduction). 16 UKW- und MW-Sender speicherbar. UKW-Muting-Funktion und Betriebsarten-Schalter (Mono/Stereo).
    2 Antennenanschlüsse für Haus- und Rotorantenne oder Kabel. Gehäuseausführung Schwarz-Metallic.

    Specification  
    FM Section With 75Ω antenna input
    Frequency Range 87.50-108.00MHz 50kHz steps
    IHF Usable Sensitivity Mono 10dBf/10.9µV, Stereo 20dBf/2.7µV
    50dB Quieting Sensitivity  
     Mono
     Stereo with Schotz NR    		 18dBf/2.2µV
    31dBf/9.7µV, without Schotz NR 40dBf/27µV
    S/N Ratio Mono > 76dB, Stereo > 71dB
    Schotz NR Improvement > 6dB
    Schotz NR Active Level 19-53dBf/2.5-125µV
    Hi-Blend Threshold Level 19dBf/2.5µV
    Muting Threshold Level 20dBf/2.7µV
    Frequency Response 20-15,000Hz ±1dB
    THD (1kHz)  Mono < 0.08%, Stereo < 0.1%
    Capture Ratio  2.3dB
    Alt. Channel Selectivity (±300kHz) > 60dB
    Stereo Separation
      100Hz/1kHz/10kHz    		 45/50/40dB
    Spurious Response Rejection > 100dB
    Image Rejection > 100dB
    IF Rejection > 100dB
    AM Suppression > 60dB
    AM Section Modulation: 400Hz, 30%
    Frequency Range 522-1,611kHz 9kHz steps
    Usable Sensitivity 50dBµ/m
    S/N Ratio (RF input 90dBµ/m) > 48dB
    THD (RF Input 90dBµ/m) < 0.4%
    Selectivity (±9 kHz) > 18dB
    Output Level/Impedance  
     FM (1kHz, Mono, 60% Mod.)
     AM (400Hz, 30% Mod.)    		 0.5-2.0V (variable)/1.5kΩ
    0.2-0.9V (variable)/1.6kΩ
    FM Antenna Inputs  
     ST-7E
     ST-7 (Australia)    		 75Ω unbalanced x 2
    75Ω unbalanced, 300Ω balanced

    Power Requirements: 120, 220 or 240V AC 50/60Hz (According to country of sale)
    Power Consumption: 15 Watts max.

    Very similar to the Nakamichi ST-7 AM/FM Stereo Tuner.

  • Net weight (2.2 lb = 1 kg)
  • 4.7 kg / 10 lb 5.6 oz (10.352 lb)
  • Source of data
  • -- Original prospect or advert
  • Mentioned in
  • -- Original prospect or advert (1987 and 1989 Nakamichi catalogues)
  • Literature/Schematics (1)
  • - - Manufacturers Literature (Service manual ST-7 ST-7E/ ST-70)
  • Literature/Schematics (2)
  • - - Manufacturers Literature (Owner's manual ST-7/ST-7E)
  • Author
  • Model page created by Franz Scharner. See "Data change" for further contributors.

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