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Tach Question with Video


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I had a similar experience one time when I forgot the generator switch. About 20 min after take off I noticed a rhythmic drop on the tach, just as I see on your video. About the same time I also noticed a voltage drop and figured out where the problem was. Obviously your generator switch was in but I wonder if the problem might be associated with low voltage since it didn't show up for me until the voltage dropped. Anyway for what it worth dept.


al meyer

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