• Country
• Great Britain (UK)

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

• Year
• 1957

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 104762

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

• Number of Transistors
• 6

• Semiconductors
• OC44 OC45 OC45 OC71 OC72 OC72

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

• Tuned circuits
• 5 AM circuit(s)

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

• Power type and voltage
• Dry Batteries / 2 x 4.5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)

• Material
• Bakelite or Plastics (type unknown)

• from Radiomuseum.org
• Model: Transistor Rhapsody OP21 - Kolster Brandes Ltd. KB, K.B.,

• Shape
• Portable set > 8 inch (also usable without mains)

• Notes

• Uses PP11 battery, 9v tapped at 4.5v with 4pin connector.

  KB service note:
  The model OP21 is the first transistorised Rhapsody and is identifiable by the rod aerial which is 5/16th" diameter with the MW winding widely spaced.

• Price in first year of sale
• 24.15 UK £

• Circuit diagram reference
• Radio and TV Servicing books (R&TVS) book

• Mentioned in
• Radio! Radio! (Date and price from Radio Radio, (Hill), page 260)

• 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