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 - A Lifetime of David Brown - by Samuel Kennedy. I was born in 1950 and reared on my family�s 100 acre farm. It was a fairly typical Northern Ireland farm where the main enterprise was dairying but some pigs, poultry and sheep were also kept. Potatoes were grown for sale and oats were grown to be used for cattle and horse feeding. Up to about 1958 the dairy cows were fed hay with some turnips and after that grass silage was the main winter feed. That same year was the last in which flax was grown on the farm. Flax provided the fibre which w
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