Re: Terry's GM HEI Coil

• To: tesla-at-pupman-dot-com
• Subject: Re: Terry's GM HEI Coil
• From: "Barton B. Anderson" <mopar-at-uswest-dot-net> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
• Date: Sat, 21 Nov 1998 06:25:02 -0700
• Approved: terryf-at-verinet-dot-com

Why not use an "electronic ignition module" already designed for the coil.
Use a magnetic pickup for the triggering. Kind of a hybrid rsg for the GM
coil. Basically, just fins which are parallel with each electrode passing a
magnetic pickup. If I were to do this, I would just build a small disk with
4 fixed fins on the ends and slide it next to an existing rsg, then rotate
the small disk for fin to electrode alignment. Build in a mount for a
magnetic pickup and adjust the fin distance to the pickup for same
amplitude. Run the signal to the ignition module and drive the coil.

Bart

Tesla List wrote:

> Original Poster: Gary Lau  19-Nov-1998 0857 <lau-at-hdecad.ENET.dec-dot-com>
>
> With the spark gap being only a few mils for firing at a few hundred
> volts, it sounds a bit futile to hope for any long term consistency in
> gap firing voltage.  How about taking a lesson from the auto makers and
> using these coils like they were designed?  Use mechanical points, a.k.a
> relays.  We don't actually need a spark gap, just a timed closure.  Or
> better yet, anyone know what cars use nowadays as far as solid-state
> points?  Now there's a triggered gap!
>
> Gary Lau
> Waltham, MA USA

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