• Country
• Great Britain (UK)

• Manufacturer / Brand
• Kolster Brandes Ltd. (KB, K.B., ITT); Foots Cray; GB

• Year
• 1937/1938

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 95877

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 5

• Valves / Tubes
• 15D1 9D2 11D3 7D5 R2

• Main principle
• Superheterodyne (common); ZF/IF 464 kHz

• Wave bands
• Broadcast, Long Wave and Short Wave.

• Power type and voltage
• Alternating Current supply (AC) / 200-250 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 8 inch = 20.3 cm

• Material
• Wooden case

• from Radiomuseum.org
• Model: KB 640 - Kolster Brandes Ltd. KB, K.B.,

• Shape
• Tablemodel, low profile (big size).

• Dimensions (WHD)
• 19.5 x 13.5 x 11 inch / 495 x 343 x 279 mm

• Notes

• "Bearing in mind the fine all-round performance of the KB 640, its exceptionally attractive appearance, unique dependability and the fact that it costs only 9½ guineas, it is one of the finest radio bargains ever offered. It will give splendid reception of the pick of the world's broadcast programmes with remarkable freedom from interference and extraneous noises."

  Wave-ranges: 16.5-50, 195-550, 970-2,300 metres.
  6 tuned circuits. Special input circuit to eliminate "whistles."
  Three-colour, illuminated, full-vision dial with station names. Provision for external speaker. Sensitive 8 in. moving coil speaker with special centring device and high-fidelity cone.
  Output 3 watts. 200-250 volts A.C., 40-60 cycles.
  Horizontal figured walnut cabinet with pleasantly contrasting reliefs.
  Dimensions: 19½: in. long, 13½ in. high, 11 in. deep. May be used with KB All-Wave “Rejectostat” aerial.

  PRlCE: 9½ GUINEAS

  Chassis is similar to that in the KB 650 table radio and 670 radiogram.

• Price in first year of sale
• 9.98 GBP

• Source of data
• Technisch- Commercieel - Radio Vademecum Staleman

• Literature/Schematics (1)
• Trader Service Sheet (suppl. of Wireless & El. Trader, etc.) (288)

• Author
• Model page created by John Koster. See "Data change" for further contributors.

• Other Models

• Here you find 415 models, 372 with images and 253 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Kolster Brandes Ltd. (KB, K.B., ITT); Foots Cray; GB