Actually, a spark can still be produced WITH NO CONDENSER WHATSOEVER in the ignition primary circuit, albeit not as intense as it is if a proper sized condensor is indeed located in the circuit in paralell with the points.......The condensor in addition greatly extends the life of the ponts ......
The coil still draws straight DC (I = E/R) current when the points are closed and the inductive effect has diminished, its just that the current is constantly being switched on then off then on then off as opposed to alwaysssssss being on when not running with ignition ON (assuming points closed) therefore more heat is generated. The inductive reactive effect a coil has is evidenced at current turn on time and current turn off time but is NOT evidenced during steady state DC conditions, at which time its a pure resistive load with I = E/R. Impedance (for AC) is dependant upon frequency while resistance (at DC) is not.
The purpose of a voltage dropping current limiting resistor used in many tractors and autos etc is two fold, yes it reduces coil current (to avoid overheating) but it also reduces the amount of current the points are forced to switch so they dont burn up prematurely
Hope this helps the original popster better understand the good old fashioned Kettering Ignition system
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
