AM/FM Stereo Tuner RT-845AX

Rotel, The, Co., Ltd.; Tokyo

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  • Year
  • 1979 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 308266

 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) / 110-130; 220-240 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: AM/FM Stereo Tuner RT-845AX - Rotel, The, Co., Ltd.; Tokyo
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 444 x 66 x 253 mm / 17.5 x 2.6 x 10 inch
  • Notes

  • An AM/FM stereo tuner with MW and VHF. Memory for 20 FM or MW Preset Radio Stations. Press buttons for Power, Auto/Manual, Mono/Stereo, Memory, AM/FM, Tuning up and Tuning Down. 10 Preset radio station buttons and a Shift button for access to stations 11-20. Digital Frequency display, Indicators for Signal, Memory, FM Stereo and Auto. Connections for AM and FM antennae and RCA phono Line Output sockets.

    Specification  
    FM Tuner Section  
    Usable Sensitivity (mono) 6.5dBf/1.2µV (75Ω)
    50 dB Quieting Sensitivity Mono  :  11dBf/2µV (75Ω)
    Stereo :  34.5dBf/30µV (75Ω)
    Signal-to-Noise Ratio (at 65dBf) Mono  :  75dB
    Stereo :  70dB
    Harmonic Distortion (at 65dBf) 0.08% (mono), 0.3% (stereo) (1kHz)
    Frequency Response 30 - 15,000Hz, +1.5dB,-1.5dB
    Capture Ratio 1.5dB
    Alt. Channel Selectivity (±400 kHz) 63dB
    Spurious Response Ratio 95dB
    Image Response Ratio 65dB
    IF Response Ratio 90dB
    AM Suppression Ratio 60dB
    Stereo Separation 100Hz/1kHz/10kHz,
    35dB/40dB/30dB
    Antenna Input 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
    110-130 V AC 60Hz
    220-240 V AC 50Hz

    Power Consumption :   10 watts

    Similar to the Rotel RT-845AXL model which additionally has LW

  • Net weight (2.2 lb = 1 kg)
  • 3.2 kg / 7 lb 0.8 oz (7.048 lb)
  • Literature/Schematics (1)
  • - - Manufacturers Literature (Owner's Manual for the RT-845AX & RT-845AXL dated 79.9.13)
  • Literature/Schematics (2)
  • - - Manufacturers Literature (Technical Manual for the RT-845AX & RT-845AXL)
  • Author
  • Model page created by Howard Craven. See "Data change" for further contributors.

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