Inductors

Discussion in 'The Projects Forum' started by RobbJohnson, Feb 3, 2013.

  1. RobbJohnson

    Thread Starter Active Member

    Dec 15, 2009
    76
    0
    I am building a 4MHz oscillator and would like some input on the difference between epoxie resin inductors that look like resistors and coils wound on coil forms or toriods. we are talking about 330 uH range.
    Any Thoughts..
     
  2. #12

    Expert

    Nov 30, 2010
    16,298
    6,811
    Thoughts: all microhenrys being the same, what else matters? The resistance (Q), current limit (size of the winding wire), and self capacitance (how it's wound) resulting in a high limit of frequency usefulness. I haven't used any of these coils, so I'm just listing parameters to check.
     
  3. takao21203

    Distinguished Member

    Apr 28, 2012
    3,577
    463
    Toroids dont radiate so much. 330uH seems a bit high for 4 MHz. A 4 MHz oscillator would normally use a radial inductor, or a crystal.

    If you use a toroid, you can take off the wire, and rewind manually.
     
    #12 likes this.
  4. #12

    Expert

    Nov 30, 2010
    16,298
    6,811
    I'd like to say that the crystal idea is a very good idea. Crystals are cheap, very accurate, and very long lasting (reliable).
     
Loading...