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Old 30th September 2002, 10:56 PM   #1
SvErD is offline SvErD  Norway
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Default inductor value

Hello all
I've got a few of these inductors and I wondered if anyone would be so kind and help me find out the inductance :-).
The dcR is close to zero as they are not wirewound but 25mm wide band(foil?). Average coil dia is ~40mm. It's 1--20 turns, a bit difficult to see.
Thanks
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Old 30th September 2002, 10:58 PM   #2
SvErD is offline SvErD  Norway
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That should be 15-20 turns
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Old 30th September 2002, 11:40 PM   #3
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If you download a program like speaker workshop (www.audua.com) and make a simple jig, you can easily measure the inductance (at least between 10hz -> 20khz) yourself, along with the DC resistance, and therefore Q factor of the inductor.

Done right, the speaker workshop way is pretty darned accurate, and very inexpensive.
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Old 1st October 2002, 12:04 AM   #4
SvErD is offline SvErD  Norway
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Thanks a lot, i'll try that
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Old 1st October 2002, 12:08 AM   #5
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One other quick note - the process of making the required jig is documented in the speaker workshop help file.

(people have been known to miss this.)
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Old 1st October 2002, 12:22 AM   #6
SvErD is offline SvErD  Norway
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As did I. Thanks again. I'll try it tomorrow.
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