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Total 9 documents matching your query.

1. Topband: Wideband Balun...? (score: 1): Author: Eddy Swynar <deswynar@xplornet.ca>; Date: Tue, 28 Aug 2012 14:29:16 -0400; Good Day All, I am thinking of incorporating a homebrewed 4:1 balun as part of a transmatch that I have here, which was designed to feed coaxial cable-fed antennas only... Is there really & truly suc; /archives//html/Topband/2012-08/msg00321.html (7,325 bytes)
2. Re: Topband: Wideband Balun...? (score: 1): Author: "Keith Jillings (G3OIT)" <g3oit.keith@jillings.org.uk>; Date: Tue, 28 Aug 2012 19:36:23 +0100; I've not come across anything that would cover that much spectrum in one unit that didn't have ferrite in it. I needed something very similar to match a doublet. I ended up with a pair of coax baluns; /archives//html/Topband/2012-08/msg00322.html (7,602 bytes)
3. Re: Topband: Wideband Balun...? (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Tue, 28 Aug 2012 15:28:15 -0400; Hi Eddy, Why did you decide on a 4:1? Generally a tuner matches a much higher impedance than a 4:1 balun will safely permit, and has the most difficulty with low impedance loads. If you use a 4:1, it; /archives//html/Topband/2012-08/msg00323.html (8,877 bytes)
4. Re: Topband: Wideband Balun...? (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Tue, 28 Aug 2012 13:12:29 -0700; Basically, you are describing the old Heathkit balun. It has two bifilar air core coils and is designed to convert 75 ohms to 300 ohms. Covers 80 through 10 meters. (Not 160 meters). You could probab; /archives//html/Topband/2012-08/msg00324.html (8,093 bytes)
5. Re: Topband: Wideband Balun...? (score: 1): Author: "Rich Chatelain" <rich_k7zv@gphilltop.com>; Date: Tue, 28 Aug 2012 13:24:14 -0700; Hi Tom, What is your recommendation (mix type and quantity) for ferrite beads on each of the 1/4 wave feed lines (RG11/U) for a 160M 4 square? I have Amidon FB-77-1024 in my inventory. Rich K7ZV Hi E; /archives//html/Topband/2012-08/msg00325.html (9,939 bytes)
6. Re: Topband: Wideband Balun...? (score: 1): Author: PaulKB8N@aol.com; Date: Tue, 28 Aug 2012 17:29:38 -0400 (EDT); The Heathkit Balun is not robust at all, the coils are close-spaced and made with #18 or #20 wire. I had one as a young ham in the 60s and was quite disappointed with the physical construction. I'd n; /archives//html/Topband/2012-08/msg00326.html (8,336 bytes)
7. Re: Topband: Wideband Balun...? (score: 1): Author: "Keith Jillings (G3OIT)" <g3oit.keith@jillings.org.uk>; Date: Tue, 28 Aug 2012 23:43:10 +0100; Yes indeed - the way it was described to me was "choke balun". I'm not a purist in such matters - if it works, I'll go with the name it was given. I was sceptical when it was suggested, but since I w; /archives//html/Topband/2012-08/msg00327.html (10,345 bytes)
8. Re: Topband: Wideband Balun...? (score: 1): Author: Gary K9GS <garyk9gs@wi.rr.com>; Date: Tue, 28 Aug 2012 18:48:42 -0500; I think what you want is an un-un...not a balun. It doesn't sound like there are any balanced elements in your system. Perhaps something like this: http://www.balundesigns.com/servlet/the-Ununs/Categ; /archives//html/Topband/2012-08/msg00328.html (9,010 bytes)
9. Re: Topband: Wideband Balun...? (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Tue, 28 Aug 2012 20:29:15 -0700; In this tutorial http://audiosystemsgroup.com/RFI-Ham.pdf There are graphs of measured data for five different ferrite materials, with the number of turns varied from 1 to 14, for several useful desi; /archives//html/Topband/2012-08/msg00329.html (11,294 bytes)

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