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1. TopBand: Toroids For Ununs (score: 1): Author: jmaass@freenet.columbus.oh.us (Jeffrey Maass); Date: Fri, 10 Oct 1997 10:57:38 -0400 (EDT); I'm reading through W2FMI's book on Baluns and Ununs, looking to replace the 4:1 transformer used to feed my inverted-L (originally used with a short, top-loaded vertical) with one for 1:1.78 (50:28.; /archives//html/Topband/1997-10/msg00159.html (7,984 bytes)
2. TopBand: Toroids For Ununs (score: 1): Author: km1h@juno.com (km1h @ juno.com); Date: Fri, 10 Oct 1997 16:24:51 EDT; There is virtually no performance difference between those values Jeff. Since it will be a very narrowband application lots of cores will work. What is the Al value of that K core? I would recommend; /archives//html/Topband/1997-10/msg00165.html (9,761 bytes)
3. TopBand: Toroids For Ununs (score: 1): Author: jmaass@freenet.columbus.oh.us (Jeffrey Maass); Date: Tue, 14 Oct 1997 09:20:06 -0400 (EDT); I had ordered an Amidon unun (Multi-match: 5 ratios available), and I'm using it right now for testing. I don't trust that little core, although it's a thicker beast than 1.5-inch cores I've seen of; /archives//html/Topband/1997-10/msg00202.html (11,101 bytes)
4. TopBand: Toroids For Ununs (score: 1): Author: km1h@juno.com (km1h @ juno.com); Date: Tue, 14 Oct 1997 14:22:07 EDT; IMO you should always wrap with #27 tape. It provides protection from sharp edges and most important HV punch-thru. Ferrite is not an insulator The Teflon provides HV insulation and conductor spacing; /archives//html/Topband/1997-10/msg00205.html (12,470 bytes)
5. TopBand: Toroids For Ununs (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Thu, 16 Oct 1997 09:49:02 +0000; To: <topband@contesting.com> It can also be a problem with 1:1 SWR's in coaxial lines, it's a problem of using the WRONG ferrite core. Saturation is almost never the problem, the problem is usually; /archives//html/Topband/1997-10/msg00220.html (8,983 bytes)

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