Delta 75 receiver

Leak, H.J.; London

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  • Year
  • 1971
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 192416

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Main principle
  • Superheterodyne (common)
  • Wave bands
  • Broadcast, Long Wave and FM or UHF.
  • Details
  • Hi-Fi equipment
  • Power type and voltage
  • Alternating Current supply (AC) / 50/60Hz: 100-127; 220-240 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Power out
  • 70 W (80 W max.)
  • from Radiomuseum.org
  • Model: Delta 75 receiver - Leak, H.J.; London
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 414 x 123 x 311 mm / 16.3 x 4.8 x 12.2 inch
  • Notes

  • A hi-fi stereo receiver with a 3 band AM/FM stereo tuner and 2 x 35 watt amplifier with an analogue dial with separate FM and AM scales, housed in a wooden case. With bass and treble tone controls, tuning and signal strength meters, filter, mute, mono, quasi stereo, AFC and terminals for 2 pairs of loudspeakers.

    Specification  
    Continuous rated power output
         		 35  + 35 watts into 8Ω THD 0.07%
    40  + 40 watts into 4Ω THD 0.14%
    25  + 25 watts into 15Ω THD 0.05%
    Music power 100 watts into 8Ω
    Frequency Response 12.5Hz-50kHz -3dB
    Damping factor into 8Ω 30
    Phono input  
    Sensitivity/Impedance
         		 Magnetic 2.5mV at 1kHz / 47kΩ
    Ceramic  20mV at 1kHz / 33kΩ
    Tape input  
    Sensitivity/Impedance
         		 Phono socket 100mV / 50kΩ
    DIN Socket 300mV / 150kΩ
    Aux. input  
    Sensitivity/Impedance 100mV / 50kΩ
    Tape output  
    Phono socket nominally 100mV avg. level from low impedance
    DIN socket nominally 100mV from 100kΩ
    FM Tuner 87.5-108 MHz
    Sensitivity (IHF)
    THD
    Selectivity
    IF Rejection ratio
    Image rejection ratio
    Stereo Separation
    Frequency response
    Antenna inputs    		 2.2µV into 75Ω input
    > 0.5%
    40dB (IHF)
    > 80dB
    > 70dB
    > 35dB at 1kHz
    40Hz-15kHz +1dB
    75Ω unbalanced, 300Ω balanced
    De-emphasis 50µs European standard
    75µs US standard available
    AM Tuner  
    Medium wave
    Sensitivity
    Adj. channel selectivity
    Image rejection ratio    		 510-1650kHz
    25µV (20dB S/N Ratio)
    20dB (IHF)
    > 45dB
    Long wave
    Sensitivity (200kHz)    		 150-275kHz
    50µV typical
  • Mentioned in
  • Radio bulletin 1973
  • Literature/Schematics (1)
  • - - Manufacturers Literature (Leak Delta 75 Service manual)
  • Author
  • Model page created by Hugo Sneyers. See "Data change" for further contributors.

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