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 - Bad Vibes - by Curtis Von Fange. One of the strangest ways to communicate with our tractor is to ask it how it feels. "Ask it how it feels," you say? Yup, ask it how it feels. Now, as with the other articles in this series one has to be able to hear what 'ole blue' is trying to say in response. The nice thing about our old iron friends is that they are usually quite consistent in their response, rather unlike some people I know who might change what they say due to the weather or other mitigating circumstances. But since t
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