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On 30 Jun 2002, at 21:10, Russ wolfe wrote: > Ahhhhh, pardon, but this is not a myth. The condenser/capacitor is there > for exactly suppressing the reverse EMF. We have to fight this problem > all the time in industrial controls. When the electro magnetic field in > the coil collapses, there is not only an energy spike generated in the > secondary of the coil, but it is also generated in the primary winding. > Therefore, we need a condenser to suppress this spike. They are the "same" spike, created by the exact same d(phi)/dt. If you managed to get rid of the one on the primary you'd find that there was also nothing left on the secondary. - ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ------------------------------------------------ To unsubscribe, E-mail to: <type3-off@vwtype3.org> For more help, see http://vwtype3.org/list/