Hi Alan -
This measured value of above returns 1.37 uH.
Now I must remove the stray 300 nH and I arrive at a corrected value of 1.07 uH.
This value correlates with an independent vector Z meter measurement within 50 nH, measured at the same operating frequency.
I would be very interested to know what value is reported by nanoVNA for that inductor @ 3 MHz
after "Mickey Mouse calibration" by short, open and ~ 50 Ohm resister in alligator clips.
Oristo