I'm surprised the copper in the primary of the "coil" didn't change more than the tungsten wire in the ballast resistor. On scopes, I left the factory Jan1, 2005. Scopes were so complex to operate then it took "Norman New Guy" right out of school to operate them. Can't imagine how they work today. I guess the knobs have disappeared and you just swipe your finger across the face to select vertical and horizontal scales and all that.
MF uses 5 amps as their break current. That's the only time I saw a number in a service manual. I have 5 Ford manuals back to the XXX engines and don't recall seeing the number they use. Course my tractors are all diesel so I have little need for such.
Nice picture JMOR. I doubt anybody has ever done what you did in showing the interaction of the inductance of the "coil" with the other parts of ignition firing. While you have everything hooked up, do everybody a favor, if you would, and put your scope V input on the black wire going to the distributor and snap a picture of the points opening with the condenser installed and without. Might give everybody an idea as to just what it does to protect the points from pitting.....Thanks.
Hey Old, I have an old Tektrinix 545 dual trace with the plug in vertical amplifiers I bought from the company surplus store 30 years ago. Don't know if it still works or not.
Hey Geo. My Yellow HF $5 cheapie works better than your red! Grin
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Today's Featured Article - Sunday Drives - by Cowboy. Summer was finally upon us here in Northern Maine. We have two types of industry up here, one being "Forestry" (Wood Products) and the other "Farming" (Potatoes). There is no shortage of farm tractors and equipment around here! I have been restoring old Farm Tractors for the past 6 years, and have found it easier and less expensive to hit all the auctions and purchase whole tractors for parts needed. My wife who works at a local school, and only has weekends and summers off, while on t
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