coil replacement, tolerance?

Staka

Member
2019-03-27 9:38 pm
Hello
i want to replace ferrite coil with air coil in crossover.

I measured values of ferrite coil:

1.56 mH, 0.22 omh.


Is it acceptable to use an air coil that has the following values:
1.50 mH, 0.30 omh

if the difference is too large, what should be the tolerance?
 

Galu

Member
2018-04-17 6:50 pm
Plus or minus 5% in the inductance value would be an acceptable tolerance in most crossover applications. Plus or minus 10% in non-critical situations.

I would regard the air coil to be a reasonable substitute, but obviously I don't know your exact application.
 

Lojzek

Member
2012-02-10 12:12 pm
Croatia
I'd advise exchanging a ferrite inductor only if it were totally of unsuitable quality and if you were causing it to saturate under normal operating conditions and it takes quite some current to start misbehaving at all. An example attached.
 

Attachments

  • Intertechnik HQ43-45 5.6mH saturation.png
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