BR20

Kolster Brandes Ltd. (KB, K.B., ITT); Foots Cray; GB

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  • Year
  • 1947
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 104636

 Technical Specifications

  • Number of Tubes
  • 5
  • Main principle
  • Superheterodyne (common); ZF/IF 470 kHz; 2 AF stage(s)
  • Tuned circuits
  • 6 AM circuit(s)
  • Wave bands
  • Broadcast, Long Wave and 2 x Short Wave.
  • Power type and voltage
  • Alternating Current supply (AC) / 110; 125; 150; 200; 225; 250 Volt
  • Loudspeaker
  • Permanent or electro-dynamic (moving coil), system not known yet. / Ø 6 inch = 15.2 cm
  • Power out
  • 4 W (unknown quality)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: BR20 - Kolster Brandes Ltd. KB, K.B.,
  • Shape
  • Tablemodel, low profile (big size).
  • Notes

  • Wavebands

    • LW:  800 ... 2000 m (400 ... 149 kHz)
    • MW:   200 ... 540 m
    • SW1: 31 m band
    • SW2: 19.5 ... 19.8m (15.4 ... 15.1 MHz)

    Connections

    • External aerial and earth
    • External speaker option
    • PU/Gram

    Tone control
    Internal "plate" / "capacity" aerial for strong / local stations.

    Dial lamps / Scale bulbs: 2 x 6.3V @ 300mA M.E.S.

    Refer to service notes for variations on early production.

  • Mentioned in
  • -- Original-techn. papers.
  • Author
  • Model page created by Peter Hoddow. See "Data change" for further contributors.

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The model is part of the collections of the following members.

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