Re: Car Ignition Coils

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "D.C. Cox" <resonance@xxxxxxxxxx>

Too much work to wind one.  Keep in mind even salvage yard coils are 
weak on current and TC caps really love current to rapidly recharge those caps.

Example, with a 4 inch coil, 4.5:1 ratio, 30 AWG wirewound, PVC tube 
sparkgap, design:

30 mA produces a 18 inch spark output
60 mA is 28 inch spark
120 mA jumps up to 40 inch spark output

All with the same basic coil design.

Best you can hope for out of an ignition coil is 3-5 mA max.  NST 
costs nearly the same and has much better output for all your time 
and work invested.


Dr. Resonance

> Hello everyone,
> Does anyone have any plans for winding their own ignition coil?
> or is it better just to go to the junk yard and try to get one?
>
> i searched the archives and found alot of great info but just 
> thought i would ask the list also.
> my coil is resonant @ 1 mhz pancake secondary. and i was thinking of 
> using a resonant transformer scheme
> driving it with 6 to 12 vdc switching the low voltage  side of the 
> ignition  coil at 1 mhz .
>
> basically a solid state oscillator design with feedback pll loop to 
> adjust primary frequency.
> switching the ignition coil to develope the high voltage of maybe 
> 15kv with useable current.
>
> please give me some thoughts i'm all ears.
> thx  tim_s