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tried measuring with load?
The negative voltage is only accurate with a minimum load on 5V. Measuring without load doesn't make sense at all, as the cable drop compensation will only work properly with a few hundred mA of load, which even a vanilla A500 will exceed.
I doubt that you can power a floppy drive with a 5-pin square connector. Just plug it to an Amiga and see that everything works fine. All units have passed single-unit-testing here.
The last reply was more than 365 days ago, this thread is most likely obsolete. It is recommended to create a new thread instead.
