|
Tractor Talk Discussion Board |
Placement of Ballast Resistor
[ Expand ] [ View Replies ] [ Add a Reply ] [ Return to Forum ]
Posted by Thomas Donahy on January 15, 2006 at 07:27:04 from (64.149.37.47):
Dear John T., Bob, KEB, Duane Larson, Bob M., JD Clooney, and others,
I need some more enlightenment on why the placement of the resistor before the coil is prefered. It was stated in a previous post that the return path for the secondary is across the plug gap through the block, and through the points and back to the coil.Also, that putting the resistor on the distributor side of the coil would be adding series resistance to the secondary return path.
I don't buy this as the points are open while the spark plug is firing. Also, the condensor would act as an open circuit. Consequently, the secondary return path would be blocked from returning through the distributor.
It would seem to me that the only return would be from the side electrode of the plug, through the block, battery, key switch, resistor, and coil primary, which is hooked to the secondary inside the coil. Since we are dealing with up to 20,000 secondary volts the addition of one to two ohms of series resistance would be negligible.
Perhaps resistor placement somehow affects the primary circuit , but I don't see how. It seems that placement of the resistor after the coil would make it more difficult to bypass during start-up, but that is that is a technical rather than theoretical issue. Please elaborate!
Replies:
Home
| Forums
| Order Support
Today's Featured Article -
Uncle Cecil's Super A Lives Again - by Mike Purcell. A week or so out of most of my childhood summers was often spent with my Uncle Cecil and Aunt Sissie in the small East Texas town of Maydelle on their 80 acre farm. Some of my fondest memories of these visits are those of learning to drive a tractor at the helm of Uncle Cecil�s 1948 Farmall Super A. Uncle Cecil was the second owner of this wonderful little tractor, but it was almost as though he had adopted an infant. The original owner was a man from Minnesota who bought her from a local dea
... [Read Article]
Latest Ad:
For sale Farmall super A tractor is complete and has just been setting for awhile,it was running when pulled out of the barn,shouldn’t take to much to get it going asking 1100.00
[More Ads]
Copyright © 1997-2026 Yesterday's Tractor Co.
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. Yesterday's Tractors - Antique Tractor HeadquartersWebsite Accessibility Policy |
|
