Connect with us

Coil position on ferrite rod?

Discussion in 'General Electronics Discussion' started by jerrytug, Nov 16, 2014.

  1. jerrytug

    jerrytug

    3
    0
    Mar 11, 2012
    Hello, I'm building a simple AM transistor radio kit for my RSGB Intermediate. The supplied ferrite rod has the coil loosely sliding on it.
    Should I glue it in the middle, or at one end, or do I have to arrange it so it can be slid along to improve reception somehow?
    Many thanks, Jerry M6HTH
     

    Attached Files:

  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,178
    2,690
    Jan 21, 2010
    The position isn't too important, but it shouldn't be free to move up and down the rod. I would fix it in place with a drop of wax from a candle.
     
    hevans1944 likes this.
  3. jerrytug

    jerrytug

    3
    0
    Mar 11, 2012
    Thanks Steve!
     
  4. duke37

    duke37

    5,212
    718
    Jan 9, 2011
    The coil position will affect the inductance which will be maximum with the coil in the centre.
    Most radios adjust the coil at the low frequency end of the band for maximum sensitivity. The capacitor is adjusted at the high frequency end of the band.
     
    ramussons, KrisBlueNZ and (*steve*) like this.
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-