Coil on a ferrite rod.
Calculating limitations:
- The winding pitch cannot exceed the doubled wire diameter;
- Coil diameter cannot be greater than the doubled diameter of the rod ;
- Winding length should be less than 3/4 length of the rod;
- When the coil is shifting it should not reach the edge of the core 1/8 of its length;
- The initial magnetic permeability of the ferrite should be greater than 100;
Calculator has been recreated at 2017-12-5, please refresh the browser cach.
ENTER THE INPUT DATA:
Select units: | AWG → | SWG → |
L | = | – Required inductance |
Ferrite rod parameters:
l_{f} = | – Length of the rod | |
d_{f} = | – Diameter of the rod | |
µ = | – Initial magnetic permeability |
Coil parameters:
d_{c} = | – Diameter of the coil-former | ||
s = | – Shift from the rod center | ||
d_{w} = | – Wire diameter | ||
p = | – Winding pitch |
RESULT:
N = | – Number of turns | |
µ_{eff} = | – Effective magnetic permeability of the rod | |
l_{c} = | – Length of the winding |
Copyright ©2017 Valery Kustarev
The calculator is based on the article "The-Inductance-of-Ferrite-Rod-Antennas-issue-3.pdf" by G3RBJ.