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In Reply to: Re: can you ever add a core to an air cored inductor" posted by dave slagle on January 29, 2007 at 19:22:18:
I agree that coiling a straight wire INCREASES it's inductance, actually by quite a large amount over that same wire just straight. But winding a brass slug into that 3 turn coil will LOWER it's inductance noticably over it's air core value - but I suspect not as low a value as the wire if not coiled.The ferrite situation is completely different - under it's inherent "filter frequency" it's addition to a straight wire will raise the inductance - above this inherent freq point it adds a "resistive" loss to any signal attempting to pass down the wire - but I don't know actually what happens to the inductance. I suspect that it will drop a lot, but it's "Q" would also drop so that it would be very hard to measure the inductance.
Regards, Allen
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- Yes! - Allen Wright 07:57:13 01/30/07 (0)
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