I got all my parts in for my Nat P, but I need to unwind one of the inductors to reach a value. I remember someone posted a website that said how much you had to remove in order to reach a wanted value. The type of inductor is a steel laminate.
Unwinding an inductor
Collapse
This topic is closed.
X
X
-
-
I use LIMP (the impedance measurement portion of the ARTA software package) to measure the impedance while unwinding inductors. All you need is the free version of the software, a resistor (preferably measured with a Ohm meter, I use 25 Ohms), your preamp/amp combo, and cables.
The SW plots the inductor's impedance magnitude and phase. Since at higher frequencies, the inductor phase is very close to +90 degrees, you can just use the magnitude and the equation magnitude = 2*pi*f*L.
So if you need a 2 mH inductor value, the impedance magnitude at 1 kHz needs to be 2 * pi * 1000 * .002 = 12.57 Ohms.- Bottom
Comment
-
Boy was I happy when I realized Speaker Workshop can measure inductors and capacitors. Made unwinding a whole lot easier. Granted, a half-decent LCR meter only costs like $50. But that's money that could be put towards more drivers!- Bottom
Comment
-
Originally posted by UndefinitionGranted, a half-decent LCR meter only costs like $50. But that's money that could be put towards more drivers!- Bottom
Comment
Comment