Universeel Ontvanger HL/7K

NSF (Nederlandsche Seintoestellen Fabriek); Leuven

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  • Year
  • 1935 ??
  • Category
  • Commercial Receiver (may include amateur bands)
  • Radiomuseum.org ID
  • 320124

 Technical Specifications

  • Number of Tubes
  • 3
  • Main principle
  • TRF with regeneration; 1 AF stage(s)
  • Tuned circuits
  • 2 AM circuit(s)
  • Wave bands
  • Wave Bands given in the notes.
  • Power type and voltage
  • Storage and/or dry batteries / 2 & 150 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Universeel Ontvanger HL/7K - NSF Nederlandsche
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 470 x 260 x 235 mm / 18.5 x 10.2 x 9.3 inch
  • Notes

  • The NSF HL/7K receiver was used on ships. The sturdy chassis is of cast aluminium. The frequency range is 15 kHz to 21 MHz in 10 bands:

    • 15-46 kHz
    • 46-125 kHz
    • 125-430 kHz
    • 350-1000 kHz
    • 1-2,7 MHz
    • 2,7-7,5 MHz
    • 7,5-9,7 MHz
    • 9,7-12 MHz
    • 12,5-15,8 MHz
    • 15,8-21 MHz.

    Reception with a crystal is also possible. The antenna is connected via a special junction-box with rejection-filter. A variant HL/7 uses 4 volts filament valves (B442, B424, B442), heaters connected in parallel fed by a 4 volts battery. A later variant H2L/7 had an extra audio amplifier valve (B443).

    HL/7 and HL7K refer to a model with 1 RF tube, 1 detector and 1 LF tube. H2L/7 refers to a model with 1 RF tube, 1 detector and 2 LF tubes. The suffix 7 relates to the series number.

    10 Wellenbereiche, durchgehend von 15 kHz bis 21 MHz

  • Net weight (2.2 lb = 1 kg)
  • 15.5 kg / 34 lb 2.3 oz (34.141 lb)
  • Author
  • Model page created by Hartmut Fischer. See "Data change" for further contributors.

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