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caps, again

Discussion in 'High Voltage' started by kimbear, Feb 12, 2012.

  1. kimbear

    kimbear Member

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    ok, my cap meter reads 205 nf...and its a high voltage capacitor in a antique tesla coil...whats the closest replacement that I can either find or make, using capacitors in series/parallel.
    Take into consiideration, I have VERY little space to deal with

    Is there a listing of standard capacitor values on the internet...cant seem to fin one.
     
  2. Reloadron

    Reloadron Well-Known Member Most Helpful Member

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    We have several members who are very good with Tesla Coils and HV Cap design, possibly a kind moderator will move this to the HV section where it may fare better.

    Also can you post the circuit with a focus on the cap you have in mind as that would help also the working voltage for the cap you need?

    Capacitor Standard Values are located in the link below Resistor Standard Values.

    Ron
     
  3. WTP Pepper

    WTP Pepper Active Member

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    Taking into account the accuracy of your capacitance meter and general tolerances of such capacitors, you will probably be fine with two HV 0.1uF (100nF) caps in parallel.
     
  4. dave

    Dave New Member

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  5. kimbear

    kimbear Member

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    Thank you guys very much...lol, I doidnt even think of the HiVoltage section for some strange reason
     
  6. DerStrom8

    DerStrom8 Super Moderator Most Helpful Member

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    Keep in mind that for any difference in capacitance, you can compensate by tapping to primary differently. I believe if you have a higher capacitance than is needed, you'l want to shorten the primary, and vice versa. I agree with WTP Pepper that two 100nF caps will work in parallel, but you must be careful about the types. They must be rated for more than twice the transformer voltage, and must be designed for high frequency. There are several types that are very lossy at higher frequencies, and these will prevent the tank circuit from oscillating properly.

    Regards,
    Der Strom
     

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