how did they generate high frequencies 1800's early 1900's

Discussion in 'General Electronics Chat' started by ace2015, Apr 19, 2018.

  1. ace2015

    Thread Starter New Member

    Oct 24, 2017
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    Hi I am interested to know how Nikola Tesla and the early pioneers managed to generate high frequency AC currents and voltages without the use of semi-conductors. My thinking is they used some form of capacitor and switching circuit or a very high speed generator.
     
  2. mcgyvr

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    Oct 15, 2009
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  3. be80be

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    Jul 5, 2008
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    Something like a relay as matter of fact you can still play with most any cheap relay and make a oscillator.

    [​IMG]
     
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  4. Dodgydave

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    Jun 22, 2012
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    Relay oscillator or telephone bell ringer circuit without the dong!
     
    Last edited: Apr 19, 2018
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  5. ace2015

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    Oct 24, 2017
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    I need to build a relay oscillator ASAP they are cool.
     
  6. AlbertHall

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    Titanic used a spark transmitter.
     
  7. bertus

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  8. Raymond Genovese

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    There are a number of his oscillator designs here https://teslaresearch.jimdo.com/oscilators/
     
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  9. RichardO

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    May 4, 2013
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    Recently, I saw a reproduction of a spark gap transmitter. It was much more sophisticated than I had expected.

    I don't have time right now but I will try to find some links.
     
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  10. BR-549

    AAC Fanatic!

    Sep 22, 2013
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    You may feed and excite any resonant circuit with a spark. The signal will be full of harmonics and dampened.

    They also used rotating machines as oscillators. Steam and electric powered.

    There was an Indian...Bose I believe.....who experimented with very high GHz frequencies using balls and spheres, and cups.

    https://www.cv.nrao.edu/~demerson/bose/bose.html
     
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