LC circuit + High power DC supply = High power RF?

Discussion in 'General Electronics Chat' started by Pleasedonthitme, Mar 4, 2016.

  1. Pleasedonthitme

    Thread Starter New Member

    Aug 29, 2013
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    If I had a very high power DC supply and I fed this into a tank circuit (with low resistance and components had high power tolerance)... would this create a very crude, high power transmitter?

    If not... why not :)?
     
  2. Sensacell

    Well-Known Member

    Jun 19, 2012
    1,128
    266
    Nope, just lots of current and burnt stuff.

    Passive components are inherently stable- no oscillation- no RF
     
  3. Pleasedonthitme

    Thread Starter New Member

    Aug 29, 2013
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    But how would this be any different to a normal tuned circuit that would oscillate?
     
  4. Sensacell

    Well-Known Member

    Jun 19, 2012
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    "normal" tuned circuits don't oscillate- oscillators oscillate.

    To generate RF you need to have active elements that can overcome the net losses of the passive frequency determining components, to build and sustain continuous oscillation.

    If you hit a tuned circuit with a pulse, it will ring like a bell, but the oscillation will quickly cease as the energy is lost.
     
  5. Pleasedonthitme

    Thread Starter New Member

    Aug 29, 2013
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    Do you know how long this oscillation would last?
     
  6. Sensacell

    Well-Known Member

    Jun 19, 2012
    1,128
    266
    Milliseconds - google "spark gap transmitter" that's what you are talking about.
     
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