Jim is right. When the points open , the field collapses which produces a wattage in the coil primary which tries to arc at the points. The condenser absorbs that charge to keep the points from burning. The voltage coming out of the coil is many times what is going in to it. This voltage in the primary acually bounces back and forth between the condenser and coil. What we see is a spark, but it is many , many sparks so close together that it looks like only one. They say it makes the coil ring. The spark is coming from the secondary windings which are picking it up from the moving field. Clear as mud?
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Today's Featured Article - New Hitches For Your Old Tractor - by Chris Pratt. For this article, we are going to make the irrational and unlikely assumption that you purchased an older tractor that is in tip top shape and needs no immediate repairs other than an oil change and a good bath. To the newcomer planning to restore the machine, this means you have everything you need for the moment (something to sit in the shop and just look at for awhile while you read the books). To the newcomer that wants to get out and use the machine for field work, you may have already hit a major roadblock. That is the dreaded "proprietary hitch". With the exception of the
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