BM20

• Country
• Great Britain (UK)

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

• Year
• 1947

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 104634

• Picture
• Schematics

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

• Number of Tubes
• 4

• Valves / Tubes
• 6A8GT 6B8GT 6V6GT 6X5GT

• Main principle
• Superheterodyne (common); ZF/IF 470 kHz; 2 AF stage(s); Reflex

• Tuned circuits
• 5 AM circuit(s)

• Wave bands
• Broadcast (MW) and Long Wave.

• Power type and voltage
• Alternating Current supply (AC) / 200; 225; 250 Volt

• Loudspeaker
• Permanent or electro-dynamic (moving coil), system not known yet. / Ø 6.5 inch = 16.5 cm

• Power out
• 2 W (unknown quality)

• Material
• Bakelite or Plastics (type unknown)

• from Radiomuseum.org
• Model: BM20 - Kolster Brandes Ltd. KB, K.B.,

• Shape
• Tablemodel without push buttons, Mantel/Midget/Compact up to 14

• Notes

• See also LMT model 1840.

• Mentioned in
• -- Original-techn. papers.

• Author
• Model page created by Peter Hoddow. 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