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Re: Coil dimensions

Original poster: "Dr. Resonance" <resonance@xxxxxxxxxx>

OD = outside diameter

PVC tubing, commonly used for water pipe, is always specified as ID, internal diameter, so a 6 inch ID PVC tube is usually around 6.35 inches OD. You need the OD to calculate total wire length required for winding, etc.

Dr. Resonance

I live in Cincinnati, Ohio.  What does OD stand for?


On 5/27/06, Tesla list <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx > wrote:
Original poster: "Dr. Resonance" <<mailto:resonance@xxxxxxxxxx> resonance@xxxxxxxxxx>

On coil diameters of 4 inches and above, always use a flat Archmedian
spiral. Sec OD to sec winding length should be in the range of 1:4
ratio. Usually procedure is to set approx 8-12 turns on primary and
adjust capacitance to match resonance point.  The equations for
inductance of flat spirals and resonance are in the Tesla List archives.

Where is your physical location --- city?

Dr. Resonance

>What determines the coil dimensions for the primary and secondary
>coils (ex. secondary height, number of coils on primary and
>secondary, shape of primary, diameter of primary and secondary,
>etc.)?  What equations are used?  Thanks.