Bi-Ampli BX998A /74

Philips; Eindhoven (tubes international!); Miniwatt

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  • Year
  • 1955 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 354691

 Technical Specifications

  • Number of Tubes
  • 16
  • Number of Transistors
  • Main principle
  • Superhet with RF-stage; ZF/IF 452/10700 kHz; 3 AF stage(s)
  • Tuned circuits
  • 9 AM circuit(s)     11 FM circuit(s)
  • Wave bands
  • Broadcast, Long Wave, more than 2 x SW plus FM or UHF.
  • Power type and voltage
  • Alternating Current supply (AC) / 90; 110; 125; 145; 180; 200; 220; 245 Volt
  • Loudspeaker
  • 2 Loudspeakers
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Bi-Ampli BX998A /74 - Philips; Eindhoven tubes
  • Shape
  • Tablemodel with Push Buttons.
  • Dimensions (WHD)
  • 710 x 440 x 317 mm / 28 x 17.3 x 12.5 inch
  • Notes

  • Philips model BX998A /74, differs from the standard version by its extended FM range of 87.5 to 108 MHz.

    Bandswitches for all AM bands and FM with motor control and illuminated push-button selectors.
    AM radio with 2 built-in ferroceptors in Faraday cage. The 2 ferroceptors are connected in series for LW and in parallel for BC.

    Wave ranges:
     -  FM: 87.5 - 108 MHz
     -  LW: 150 - 345 kHz
     -  BC: 517 - 1620 kHz
     -  BC "Local": 517 - 1615 kHz (with its own tuning capacitor and scale)
     -  SW1: 1,6 - 5,2 MHz (185m - 57,5m)
     -  SW2: 5,1 - 15 MHz (59m - 20m) with fine tuning (S43) on separate scale
     -  SW3: 14,7 - 26,5 MHz (20,4m - 11,3m) with fine tuning (S43) on separate scale.

    AM I.F. filters with variable bandwidth, mechanically coupled to the treble tone control.
    Separated tone control for bass and treble.
    Amplifier: "Bi-Ampli" separated output stages for bass and treble. 
    The bass amplifier is a shunt regulated push-pull type (2x PL81).
    The treble amplifier is of common single ended design (EL84).

    Loudspeakers:
     -  9758A (24 cm, 700Ω) for bass
     -  9768M (15 cm, 5Ω, co-axial) for treble

    Dial lamps:
     -  7x 8089N (bajonet, 12V/100mA)
     -  5x 7994N (bajonet, 7,2V/100mA)
     -  3x 8024N (bajonet, 6,3V/300mA).

    See the standard model BX998A with FM range up to 100 MHz.

  • Net weight (2.2 lb = 1 kg)
  • 27 kg / 59 lb 7.5 oz (59.471 lb)
  • Author
  • Model page created by Francisco Martins. See "Data change" for further contributors.

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