Re: A stable and repeatable low value capacitance meter
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A while ago I compared the performance of a number of units like that from several different sources.? Some of them were very good, some were really bad.? I tracked this down to (mostly) the quality of the reference inductor.? The good ones had inductances that remained fairly constant over the frequencies generated by the unit. The inductance of the bad ones varied significantly so the accuracy became worse as the calibration and? DUT test frequencies diverged (no compensation in the software as far as I could tell).? I suspect they were all "copies" of the same design, but some manufacturers saved a few pennies on the inductor.? Some of the worst were wound on toroids, but from measurement it looked as though the ferrites were designed for EMI suppression rather than inductor applications.
Hang on to your good unit!
PeterS???????? G8EZE
-----Original Message-----
From: Hans Wagemans <on4cdu@...>
Sent: Sun, 4 Sep 2022 11:57
I use this LC meter and am very satisfied with it:
LC meters on Ebay that look the same have a much worse specification.
73, Hans, ON4CDU
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