Home › Forums › temp › Ground choke for long ground wire › Calculating…

October 28, 2008 at 7:15 pm #16845

krimles

Total posts : 45366

Guest

Total posts : 45366

Ermi I don’t understand how you arrive at the figure of a few hundred ohms. These are my calculations:

N = 1000 x sq. root (L/AL) (where L and AL are in units of mH)

For 17 turns on a ferrite toroid of AL = 6065, I get and inductance of 1.75mH

At 1.6MHz this results in an impedance of 17.6kohms

You talk about the ferrite having an effective lower inductance at 1.6MHz, but I cannot find any reference to that effect. What gives?