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1. Topband: Measuring Inductor Q (score: 1): Author: GEORGE WALLNER <gwallner@the-beach.net>; Date: Sun, 06 Jul 2008 13:16:13 -0400; G'day Topbanders, I am trying to measure the Q of large air would and toroidal inductors. I have built a jig that I use to series resonate the coil at the frequency of interest (1.8 and 3.5 MHz). The; /archives//html/Topband/2008-07/msg00046.html (7,442 bytes)
2. Re: Topband: Measuring Inductor Q (score: 1): Author: Michael Tope <W4EF@dellroy.com>; Date: Sun, 06 Jul 2008 11:24:49 -0700; George, I haven't personally tried this in my lab, but the method (resistive divider technique) appears sound and claims to be good for inductors up to 400: http://www.edn.com/article/CA196485.html G; /archives//html/Topband/2008-07/msg00048.html (8,269 bytes)
3. Re: Topband: Measuring Inductor Q (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Sun, 06 Jul 2008 13:28:35 -0700; Study the test setup and discussion about it in the two pdfs on my website about RFI for Hams and Coaxial Chokes. http://audiosystemsgroup.com/publish Two major obstacles to getting accurate measurem; /archives//html/Topband/2008-07/msg00050.html (9,503 bytes)
4. Re: Topband: Measuring Inductor Q (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Sun, 6 Jul 2008 20:59:10 -0700 (PDT); Jim is on the right track here. I have a slightly different approach. What I like to do is make a parallel resonant tank with the inductor under test and a high Q capacitor. (Any NP0/C0G ceramic will; /archives//html/Topband/2008-07/msg00051.html (9,971 bytes)
5. Re: Topband: Measuring Inductor Q (score: 1): Author: Larry Molitor <w7iuv@yahoo.com>; Date: Mon, 7 Jul 2008 06:42:12 -0700 (PDT); The method described by Rick above is what I use with an exception. Instead of the 1 pF coupling capacitors, I use a pair of single turn shielded links. The coil under test can then be physically pla; /archives//html/Topband/2008-07/msg00053.html (10,166 bytes)

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