That sounds pretty neat, Jim. Do you have any links or sources? Thanks in
advance :)
On Mon, Feb 13, 2023 at 8:21 AM Lux, Jim <jim@xxxxxxxxxxxxx> wrote:
> On 2/13/23 2:58 AM, Joshua Thomas wrote:
> > Funny you mention this, I have a classic coil (can shape, oil filled)
> that
> > I was thinking how to use in a coil. Interested in what others have done.
>
>
> There's the GMHEICSLR (GM HEI coil spark length record) - running off
> 110VAC with a triac - More than 30cm sparks, as I recall.
>
>
> >
> > On Mon, Feb 13, 2023 at 3:37 AM Lux, Jim <jim@xxxxxxxxxxxxx> wrote:
> >
> >> Has anyone tried using the secondary of an auto ignition coil as a
> >> charging inductor for a small coil?
> >>
> >> They are 10-30 H (depending on who measured it, etc.) They've got the
> >> HV insulation.
> >>
> >> I was wondering about the current handling. Typically, they seem to
> >> have a DC resistance of some 10 kOhm or more, and if you're driving
> >> from, say, a NST with an RMS output current of 30 mA, that works out to
> >> about 9-10 Watts dissipation (because I've not got a spice model of the
> >> actual charging current, etc.)
> >>
> >> Or, alternately, any source for 10 H inductors that can hold off 20kV?
> >> Short of winding my own. 200 or so turns on a 4 cm diameter core with
> >> mu=5000 would do it. Have to wind in 20 turn chunks to keep the voltage
> >> rating, reasonable, but that's doable.
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