The flicker often seen in lights powered by a generator pulled by a 2 cylinder Deere tractor is FREQUENCY distortion. It is caused by RPM variation between power and non-power portions of crankshaft rotation. As generator voltage output is proportional to RPM it can cause a visible flicker in incandescent lights as the RPM varies up and down with each pair of power strokes.
It's most noticeble with the slowest turning diesels (R, 80, 820, etc) and less noticeable with the higher RPM small gassers (H, M, 40, 420, etc). And it's essentially non-existent on a generator pulled by a fast-spinning 6 cylinder like a 4020.
Incidentally HARMONIC distortion is the distortion of current/voltage waveform from an ideal sine wave. You need an oscilloscope or other waveform analyzer to detect it. Harmonic distortion does not cause lights to flicker.
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Today's Featured Article - Box Plow Blues - by Tom Schwarz. One of the first implements most tractor owners obtain is the box plow. For very little money, this piece of equipment promises to plow and flatten any hill or vale on your ranch road or farm. At least that's what I thought! As simple as a box plow appears, it can be rather challenging to make work correctly. In our sandy soils of Florida, traction is king. You can never have wide enough tires or heavy enough weights to get all the traction you want … unless you own a monster tractor. U
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