Ignition Coils (Re: solid cores)

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>" <davep-at-quik-dot-com>


>>ED: THANK YOU FOR YOUR COMMENTS. IF YOU TUNE THE PRIMARY WINDING TO THE
>>SECoNDARY WINDING JUST LIKE A TC YOU WILL FIND THE VOLTAGE WILL JUMP 3X
>>A SIMPLE CAPACITOR WILL TUNE THE PRIMARY JUST AS WITH A TC COIL. THIS
>>CHANGES THE MAKE-BREAK COIL TO A RESONANT COIL SYSTEM LIKE THE TC.


> Robert:

> 	Not sure what you mean by tuning the primary winding to the

>secondary winding.  Unlike the ordinary TC these windings are much

>more tightly coupled.  Since the capacitance across the primary is

>capacitance across the M-B points if is effectively in parallel

>with the reflected capacitance of the secondary.


	Assuming this is ad rem traditional points-n-coil type
	gasoline engine ignition:
	Indeed, such like are nearly (VERY nearly) Tesla
	systems.  The resonance is not tot he break rate, but
	the cap IS resonant with the system.  cf the Original
	patent by Charles Kettering.  (Many times the
	resonant aspect of this system gets 'oversimplified out'
	of the explanation, indeed, mostly it's not mentioned.)
	best
	dwp