Calypso WP31/L

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

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  • Year
  • 1965 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 300101

 Technical Specifications

  • Number of Tubes
  • 9
  • Valves / Tubes
  • Number of Transistors
  • Main principle
  • Superheterodyne (common); ZF/IF 470 kHz
  • Wave bands
  • Wave Bands given in the notes.
  • Power type and voltage
  • Dry Batteries / 9 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4 inch = 10.2 cm
  • Power out
  • 0.4 W (unknown quality)
  • Material
  • Leather / canvas / plastic - over other material
  • from Radiomuseum.org
  • Model: Calypso WP31/L - Kolster Brandes Ltd. KB, K.B.,
  • Shape
  • Portable set > 8 inch (also usable without mains)
  • Dimensions (WHD)
  • 254 x 191 x 89 mm / 10 x 7.5 x 3.5 inch
  • Notes

  • Wavebands; MW, LW, and MW bandspread.

    The visual differences between the WP31 and the WP31/L include, " Luxembourg " marked boldly on the lower half of the dial, and 2 small trimmer capacitors are mounted on the switch assembly.

    The KB service manual states; The difference between the WP3I and WP31/L versions of these models, are as follows:
    On the /L versions, the microphone amplifier is permanently connected to the input of the main amplifier and cannot be switched via the volume control by pressing the M.W. and L.W. buttons together.
    When the M.W. and L.W. buttons are pressed together on the /L versions, giving Luxembourg bandspread, T2, Cl, C2, T3 and C10 are switched into circuit, reducing the frequency range of the medium waveband circuitry.

    Battery type; PP9, 9 volt.

    Alternative transistors;
    2SG417 Y159 2G417 2G317B 2G374B 2G374B 2G381A 2G339A 2G309

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