Toroid Calculation


This side will explain how to calculate toroidcoils.
I have made toroid tests with different number of turns and measured the inductance.


Click to se a larger picture Formula : L (nH) = N2 *AL

Where:
L = inductance in nanohenrys
n = number of turns
AL = inductance factor




Fabr Philips

3E25: <500 kHz
3F3: <500 kHz
4A11: 3-30 MHz
4C65: >30 MHz toroid4c65.pdf






Test measurement
I have measured the inductance according to the number of turns. Table below shos the results!

N
Inductance
1
0.207uH
2
0.486uH
3
0.836uH
4
1.28uH
5
1.83uH
6
2.486uH
16
12.4uH










You can order toroids from ELFA Sweden

Link visit my LC meter project.


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