We were somewhere around Barstow, on the edge of the desert, when the drugs began to take hold. I remember Harry Bloomfield saying something like:
That's exactly what I used to do. Older alternators were notorious for getting damp and refusing to output. A few hours of gentle heat wafting in the vents often sorted them out and the heat of supplying a moderate load completed the job.
A short in a winding often doesnt affect the resistance noticeably, but does have a major impact on inductance. If you can measure L you should find any such problem. A simple little oscillator should do that, using the alternator as an inductor.
NT
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