I tried building a toroidal inductor with the following parameters:
OD= 1.400 in / 35.55 mm +/- 0.75 mm
ID = 0.900 in / 23.0 mm +/- 0.55 mm
Ht = 0.500 in / 12.7 mm +/- 0.50 mm
Wire: solid insulated copper 14G
Data sheet for the material: https://www.fair-rite.com/43-material-data-sheet/
For some reason inductor the is not working when a connect it to a battery (doesn't work as a magnet). I was expecting to get more than 100 micro Henry out of it.
Is it possible that is not working because the wire is insulated with thick plastic? What are other possible reasons for it not working? Thank you!