i want to build inductor

Discussion in 'Wireless & RF Design' started by blackhole, Jan 9, 2011.

  1. blackhole

    Thread Starter New Member

    Nov 29, 2010
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    0
    i want to build inductor for radio tuning what is the core and wire made from??
    i want an obtainable materials???
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    The wire will always be copper magnet wire. The core material will vary with frequency. What kind of radio do you have in mind? Is this a first project?
     
  3. blackhole

    Thread Starter New Member

    Nov 29, 2010
    8
    0
  4. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    That's going to be a challenge. The antenna inductor is obsolete, but you may be able to get some info - http://rocky.digikey.com/weblib/Toko/.../7P%20(Variable%20Coils).pdf

    L2 is a mystery.

    By the way, those inductors are wound on a cardboard form and have a ferrite slug inside to do the tuning. L2 is center tapped.

    The schematic has some age to it. You might want to look further, as several semiconductors may be hard to find, like the double gated JFET. Superregenerative radios can be a bit of a trial, as they as they are so sensitive to layout and technique.
     
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