AM/FM Stereo Tuner RT-850

Rotel, The, Co., Ltd.; Tokyo

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  • Year
  • 1985
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 288631

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Main principle
  • PLL, Phase-locked loop
  • Wave bands
  • Broadcast (BC) and FM or UHF.
  • 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: AM/FM Stereo Tuner RT-850 - Rotel, The, Co., Ltd.; Tokyo
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 430 x 66 x 320 mm / 16.9 x 2.6 x 12.6 inch
  • Notes

  • An AM/FM stereo synthesizer tuner covering MW and FM with a digital frequency display. With 8 station push buttons each of which can retrieve one stored FM and one stored MW radio station, Memory button, push buttons for Tuning up and Tuning Down, FM Auto-Tuning, FM Mute Off/Mono, AM bandwidth (Narrow/Wide), Bands (AM, FM), 5 signal strength LED indicators, indicators for Memory and Stereo, adjustable clip-on loop aerial on the back, connections for AM and FM antennae and RCA phono Line Output sockets.

    Specification  
    FM Tuner Section  
    Usable Sensitivity (mono) 5dBf / 0.95µV
    50dB Quieting Sensitivity Mono   8.8dBf / 1.5µV
    Stereo  31.2dBf / 20µV
    Signal-to-Noise Ratio  (at 65dBf) Mono    80dB
    Stereo  75dB
    Harmonic Distortion (at 65dBf) 1 kHz 0.07% (mono), 0.25% (stereo)
    Frequency Response 30-15,000Hz ,+1dB, -1dB
    Capture Ratio 1.0dB
    Alternate Channel Selectivity (±400kHz) 63dB
    Spurious Response Rejection 95dB
    Image Response Ratio 70dB
    IF Response Ratio 95dB
    AM Suppression Ratio 58dB
    Stereo Separation 100Hz/1kHz/10kHz,
    43dB/46dB/38dB)
    Antenna 75Ω unbalanced
    AM Tuner Section  
    Sensitivity 350µV/m
    Selectivity Wide/Narrow 27dB / 42dB
    Signal-to-Noise Ratio 60dB
    Image Response Ratio 40dB
    IF Response Ratio 40dB
    Antenna Loop antenna

    Versions/Power Requirements
    120 V AC 60Hz
    220 V AC 50Hz
    240 V AC 50Hz
    120/220/240 V AC 50/60Hz (not available in UK, Canada and Scandinavia)

    Power consumption: 10 watts

    Similar to the Rotel RT-850L model which additionally has LW.

  • Net weight (2.2 lb = 1 kg)
  • 3.8 kg / 8 lb 5.9 oz (8.37 lb)
  • Literature/Schematics (1)
  • - - Manufacturers Literature (Owner's manual RT-850 RT-850L)
  • Literature/Schematics (2)
  • - - Manufacturers Literature (Technical manual RT-850 RT-850L)
  • Author
  • Model page created by Howard Craven. See "Data change" for further contributors.

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