Quoting Removed, click Modern View to seeWell, it is back there sometime yesterday, at least in Modern View, but here it is again:
" 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. " I would do that, but I did all that back in the winter of 2007 & now on this July in Texas day, it is just too darned hot to get out there. In my notes that I made at the time, however, I see that there was little difference in the voltage appearing across the points with caps from 0.01 to 0.4 microfarads. What is clearly visible is the amount of arcing at the points. The least with a "factory" value of 0.2-0.3 & increasing with larger value & increasing a large amount with much smaller values until the greatest with no cap at all. With no cap at all, the HV spark is weak enough to cause missing, but the ring up voltage spike remained more less the same voltage. I believe, because, voltage of 'inductor' will still rise to whatever is necessary to establish an arc at plug. Clearly evident however, is the loss of energy that is being burned up/dissipated in points arcing and this is seen as greatly reduced duration of plug arc time (from 2.5milliseconds to 1 millisecond with no cap). As a side note, one of our 8Ns will not run with no cap.........must be marginal?
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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