FM Tuner Mk. 9

Lowther Manufacturing Co; Kent

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  • Year
  • 1972 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 340840

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Main principle
  • Superhet with RF-stage; ZF/IF 10700 kHz
  • Wave bands
  • FM Broadcast Band Only
  • Power type and voltage
  • Alternating Current supply (AC) / 48-62 Hz, 220-240 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: FM Tuner Mk. 9 - Lowther Manufacturing Co; Kent
  • Shape
  • Tablemodel with Push Buttons.
  • Notes

  • Lowther FM Mark 9 Tuner exemplifies modern techniques and design, providing the highest standard of musical performance and ease of operation.

    Tuning by means of a direct frequency meter for manual control; 4, pre-set push buttons or automatic scanning of the FM Band II then by simply pressing the AFC switch locking the station of your choice.

    Stereo multiplex operation is automatic with a 'beacon' indicating which transmissions are being sent stereophonically.

    The above unique features are accomplished by modern integrated circuit modules, Varicap diodes, and automatic frequency control of the four tuned stages in the front end. Field effect transistors for RF amplification and dual gate MOS-FET mixer.

    The IF amplifiers employ IC modules; ceramic filter units, and high 'Q ' coil assemblies, providing high gain low noise, and wide bandpass.

    Stereo-decoding uses the latest phase lock loop system, providing stereo switching and indication.

    A second meter indicates field strength measurement enabling alignment of the aerial array, weak signals should be switched to Mono.

    Technical Information

     

    Frequency Range:   87.5-104.5 MHz
    Sensitivity: Mono 1 µV
      Stereo 15 µV
    S/N + N to N ratio: 1 mV, 75 kHz, 400 Hz 67 dB
    Stereo Chan. Sep.: 1 mV, 400 Hz 40 dB Typ.
    THD: 1 mV, 75 kHz, 400 Hz 69 dB
    AFC Pull Range: >10 µV, 75 Ω ± 400 kHz
    Audio Output: Output 1 300 mV
      Output 2 100 mV
    Detector Bandwidth: Peak to Peak 1 MHz
    IF Bandwidth: (3 dB) >210 kHz

     

  • Mentioned in
  • - - Manufacturers Literature (Catalogue Circa 1972)
  • Author
  • Model page created by Gary Cowans. See "Data change" for further contributors.

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