Re: Coil dimensions

["Tesla list" <tesla@xxxxxxxxxx>]

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?
>
> Thanks,
> Andrew
>
> 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.
> >
> >Andrew
> >
> >