• Year
  • 1943 ?
  • Category
  • Radio part (not a module) 
  • Radiomuseum.org ID
  • 177437

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • No Power needed
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: Crystal FT-241 - MILITARY U.S. different makers
  • Shape
  • Miscellaneous shapes - described under notes.
  • Dimensions (WHD)
  • 29 x 39 x 12 mm / 1.1 x 1.5 x 0.5 inch
  • Notes
  • FT-241 crystals, black series, were used in the BC-604 with a working frequency 20-27,9 MHz, 80 "channels" numbered 0-79.
    Their fundamental frequency is 370,370 - 516,666 kHz, to be multiplied by 54.

    FT-241 crystals, brown series, were used in the BC-684 with a working frequency 27-38,9 MHz, 120 "channels" numbered 270-389.
    Their fundamental frequency is 375,000 - 540,277 kHz, to be multiplied by 72.
    This crystal type is far not as indestructible as the FT-243 type; the small silvered crystal-plate is welded-connected with two spring-type wires, but these connections are often broken after many years.
    These crystals have a very interesting fundamental frequency range to compose sharp IF- filters around 450-475 kHz.
  • Net weight (2.2 lb = 1 kg)
  • 0.010 kg / 0 lb 0.4 oz (0.022 lb)
  • Source of data
  • - - Data from my own collection
  • Author
  • Model page created by Jan Terranea. See "Data change" for further contributors.

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The model Crystal (Quartz) is part of the collections of the following members.

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