Love it!
Sent from Yahoo Mail for iPhone
On Saturday, March 7, 2026, 17:24, Mark Rzeszotarski via Tesla <tcml@xxxxxxxxxxxxxxx> wrote:
Several decades ago while investigating mutual inductance, I built a
great many coils using various coil geometries. In your case, when
estimating the coupling between the primary and secondary, be aware that
most of the trumpet coil inductance will exist in the first several
turns of the coil, since inductance depends on the coil radius squared.
That should be kept in mind when determining the primary coil
placement. The mutual inductance between the primary and secondary will
strongly depend on the proximity of the primary with the first several
turns of the trumpet coil, where most of inductance resides.
Mark Rzeszotarski, Ph.D.
On 3/7/2026 11:27 AM, lightning fun wrote:
> Looking at makeing a trumpet or tapered coil, (assumed benefit coupling)..
> just got the capital funds working again, interested but tught on time and
> resources.. more data and ideas welcome..
>
> Best regards,
>
> David Thomson
> _______________________________________________
> Tesla mailing list -- tcml@xxxxxxxxxxxxxxx
> To unsubscribe send an email to tcml-leave@xxxxxxxxxxxxxxx
>
>> _______________________________________________
>> Tesla mailing list -- tcml@xxxxxxxxxxxxxxx
>> To unsubscribe send an email to tcml-leave@xxxxxxxxxxxxxxx
>>
> _______________________________________________
> Tesla mailing list -- tcml@xxxxxxxxxxxxxxx
> To unsubscribe send an email to tcml-leave@xxxxxxxxxxxxxxx
--
Mark S. Rzeszotarski, Ph.D., FAAPM, DABR
Emeritus Professor of Radiology
Emeritus Professor of Biomedical Engineering
Case Western Reserve University
Cleveland Ohio, U.S.A. 44109
_______________________________________________
Tesla mailing list -- tcml@xxxxxxxxxxxxxxx
To unsubscribe send an email to tcml-leave@xxxxxxxxxxxxxxx
_______________________________________________
Tesla mailing list -- tcml@xxxxxxxxxxxxxxx
To unsubscribe send an email to tcml-leave@xxxxxxxxxxxxxxx