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Registered Member #2463
Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
If you use a relay oscillator, and have the battery in series with the coil and the contacts, use a capacitor across the contacts, like the kind found in the distributor of 'old' cars. they were about 0.4 uF. and rated in high 100's of volts. Without that cap you got no spark, so you walked. I once pinched the suppression cap off the alternator to get home.
Registered Member #1408
Joined: Fri Mar 21 2008, 03:49PM
Location: Oracle, AZ
Posts: 679
There are coils that are not legal for the street in the USA but for racing, especially drag racing that are very dangerously powerful. They have warning stickers all over them when you get them from junk yards, etc. I have only seen one guy who had a working one and it put down 6cm of the thickest spark I've seen from a coil. This was NOT from mains but a 24 v supply! You can find them on the web - under "non-street legal coils, Mallory". The specs are quite unique! The guy used a 555 driver but it kept having problems.
Registered Member #2316
Joined: Tue Aug 25 2009, 03:04AM
Location: Bendigo, Australia
Posts: 107
I have got my relay oscillator working and I have had the best results with a 1.2 uF motor start cap. About 40kv and with parallel antiphase coils 80kv.
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Help with an ignition coil?
