top load capacitance

DerStrom8 said:

It would be very difficult to determine the actual capacitance, as it exists between the outer surface of the topload and ground. However, it is most likely in the pF range. I would assume you want to know in order to be able to calculate the resonant frequency? You can measure that using a Tesla Coil Tuner, which I think I posted in another thread recently. It uses a single 555 timer and some readily-available discrete components. It would definitely be a worthy build and will help you a lot in tuning your TC.

Regards,
Der Strom

P.S. Here's a site you can use to estimate the capacitance, as long as you have a standard topload shape (shpere or torus):

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lokeycmos said:

i do have a function generator. could i hookup my function generator with amp meter in series in place of the circuit you posted and measure resonance frequency when the meter is at max?

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DerStrom8 said:

Actually, do you have an o-scope? That would be much better for comparing frequencies of the tank circuit and secondary coil. I'm sure there is a way to test it with an ammeter, I just can't remember it at the moment

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lokeycmos said:

I can use the local tech school electronics lab next week too!

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