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Thread: Building an air core resonant transformer.

  1. #1 Building an air core resonant transformer. 
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    If you didn't know already an air core resonant transformer is also known as a Tesla Coil.

    My friends and I really want to build a small Tesla coil and I have a few questions before we get started. Note: it should be as inexpensive as possible (I have a bunch of wire leftover from the magnet.)

    1. Many people recommend a neon sign transformer, but since we want this to be fairly inexpensive I want to use the Flyback transformer out of some old CRT tvs or monitors.

    2. For the capacitor, how do i know what the voltage and capacitance ratings are?

    3. As a cheap capacitor could/should i use a saltwater+ glass bottle one? or a glass/polystyrene+aluminum sheet one?

    4. Would a speaker wire work for the primary coil? or some bell wire?

    Any advice on the best way to do this would be much appreciated.

    Thanks,
    Gmano


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  3. #2  
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    OOOhhhh Dear, it's that word 'Tesla' again, the guy all non-engineers seem to whorship, he who proposed a death ray etc.

    Now what is it you are trying to do? if you are looking to generate high voltages try Van Der Graff generators, if you are looking for resonant air-cored transformers, open up an old analogue radio. Air cored transformers are extremely
    inneficient, they were used in radios simply to overcome eddy current losses in solid core transformers. If you are looking to make such a thing and want to know about the capacitor that goes with the coil, there's a little thing called 'Q factor' which will help you determine the maximum voltage in the (perfect )circuit, you'll also need the old F = 1 over (2 Pi root (LC )) to help with determining the resonant frequency (oh yes there's all the mutual stuff to throw in as well),
    A bit of maxwell, as well andthere you have it, maybe Harold could be a bit more helpful

    Your question is about as vague as "How should I design a time machine"

    My advice would be (and don't take this too lightly), stick to downloading music to your ipod!


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  4. #3  
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    I dont like Ipods..

    No, im simply asking what would be the best kind of capacitor to use for a tesla coil, while still being cheap. sheets of foil with polystyrene plates? or slatwater in a glass bottle.

    and whether a flyback transformer will work
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  5. #4  
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    Quote Originally Posted by Megabrain
    OOOhhhh Dear, it's that word 'Tesla' again, the guy all non-engineers seem to whorship, he who proposed a death ray etc.

    Now what is it you are trying to do? if you are looking to generate high voltages try Van Der Graff generators, if you are looking for resonant air-cored transformers, open up an old analogue radio. Air cored transformers are extremely
    inneficient, they were used in radios simply to overcome eddy current losses in solid core transformers. If you are looking to make such a thing and want to know about the capacitor that goes with the coil, there's a little thing called 'Q factor' which will help you determine the maximum voltage in the (perfect )circuit, you'll also need the old F = 1 over (2 Pi root (LC )) to help with determining the resonant frequency (oh yes there's all the mutual stuff to throw in as well),
    A bit of maxwell, as well andthere you have it, maybe Harold could be a bit more helpful

    Your question is about as vague as "How should I design a time machine"

    My advice would be (and don't take this too lightly), stick to downloading music to your ipod!
    What century are you in? Tesla has been proven totally correct. In just about everything he ever said, most of it he built, and demonstrated. Most wondered, if what they were seeing is real, why wouldn't the honest politicians flock to it.

    Just now we are realizing to my astonishment that many politicians are not as smart or honest as many thought.

    Stupid greedy criminal types, seem to fit them.

    Seriously Tesla was an excellent engineer. Amazing man. But dishonest sorts had trouble with death rays in the hands of honest men that would do the work of God.

    We have rays that can detonate the initiating caps in ammunition. Rays to put you to sleep by warming you, and releasing gases in your blood that put you to sleep. Give you a high fever basically.

    We have rays to boil subs in the ocean. What are you saying Tesla made this stuff up?

    Maybe the military frowns upon kids in college learning to create "legalized ponzi schemes" and seven or eight figure early corporate retirement packages, having this information. And do not share these little known bits of information with those sorts.

    Universal Scientists, American citizens do share all technical information.


    Sincerely,


    William McCormick
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