Ryuji,
I tried open and shorted and it did not seem to make any difference so left the primary open.
NanoVNA is a little more difficult to get exact Hz measurements easily.
Yes, uH
73
Ross
Sent from my iPhone 6
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On 30 Sep 2023, at 22:35, Ryuji Suzuki AB1WX <ab1wx@...> wrote:
Now, my question is, what did you connect to the primary while measuring the secondary impedance? Are the vertical axes in microhenries?
