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1. Topband: a box of ferrites (score: 1): Author: Michael Walker <va3mw@xxxxxxxxxxxxxx>; Date: Wed, 31 May 2017 21:51:46 -0400; This group is clearly one of the most technical groups around and if this off topic enough, please kill it. The question is that if you have a box of ferrites with no labels on them, how could you me; /archives//html/Topband/2017-05/msg00152.html (7,055 bytes)
2. Re: Topband: a box of ferrites (score: 1): Author: Sean Waite <waisean@xxxxxxxxx>; Date: Thu, 01 Jun 2017 02:16:36 +0000; W1HIS talks about how to identify ferrites in appendix 1 of this doc: http://www.yccc.org/Articles/W1HIS/CommonModeChokesW1HIS2006Apr06.pdf -Sean WA1TE _________________ Topband Reflector Archives -; /archives//html/Topband/2017-05/msg00154.html (7,822 bytes)
3. Re: Topband: a box of ferrites (score: 1): Author: Michael Walker <va3mw@xxxxxxxxxxxxxx>; Date: Wed, 31 May 2017 23:26:34 -0400; Thanks All Hence the reason I have been buying some fleamarket chokes. Brian, I tried a jig where I would wrap about 8 turns of wire around the choke and then sweep it with the SpecA and see how many; /archives//html/Topband/2017-05/msg00155.html (8,701 bytes)
4. Re: Topband: a box of ferrites (score: 1): Author: Rob Atkinson <ranchorobbo@xxxxxxxxx>; Date: Thu, 1 Jun 2017 11:30:09 -0500; If you don't mind wasting money on costly ferrite snap on cores at around $3 each you can mindlessly put them on everything, but at that cost they are a last resort for me. I try before that point:; /archives//html/Topband/2017-06/msg00000.html (6,669 bytes)
5. Re: Topband: a box of ferrites (score: 1): Author: "Richard (Rick) Karlquist" <richard@xxxxxxxxxxxxx>; Date: Thu, 1 Jun 2017 10:47:13 -0700; Nice article, but if you want the quick version, use a method suggested by W8JI. Determine the frequency at which R = |+jX| and look at the Fair-Rite products web site to cross reference to the clos; /archives//html/Topband/2017-06/msg00001.html (7,616 bytes)

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