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1. [Amps] Sleeve Baluns FS (score: 1): Author: "Marv Gonsior" <w6frmarv@dslextreme.com>; Date: Sat, 25 Apr 2009 21:56:16 +0430; Greetings All, I?ve noted the thread regarding baluns with interest and I have 5 ferrite cores that are a perfect fit over RG-8 type coax to make a good sleeve balun. They measure 1 1/8? in length, w; /archives//html/Amps/2009-04/msg00346.html (6,653 bytes)
2. Re: [Amps] Sleeve Baluns FS (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Sat, 25 Apr 2009 11:55:28 -0700; You didn't say what ferrite material these are, but this is pretty close to what Palomar sells as a "high power current balun." That one is a VERY inferior version of W2DU's choke. 5 cores of any mat; /archives//html/Amps/2009-04/msg00350.html (7,333 bytes)
3. Re: [Amps] Sleeve Baluns FS (score: 1): Author: Vic K2VCO <vic@rakefet.com>; Date: Sat, 25 Apr 2009 12:04:53 -0700; Jim, I think you missed the statement that the cores are 1-1/8" long. This makes them equivalent to several of the usual "lifesaver-shaped" ones. The effect is proportional to the total length, not t; /archives//html/Amps/2009-04/msg00351.html (7,981 bytes)
4. Re: [Amps] Sleeve Baluns FS (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Sat, 25 Apr 2009 22:57:41 -0700; No, I didn't miss that at all, Vic. I have cores like that (including some that I bought from Palomar to see what they were selling as a balun). My comments are based on those cores. It is a very poo; /archives//html/Amps/2009-04/msg00365.html (7,573 bytes)
5. Re: [Amps] Sleeve Baluns FS (score: 1): Author: Vic K2VCO <vic@rakefet.com>; Date: Sat, 25 Apr 2009 23:07:49 -0700; They may be made out of a material that's inappropriate for the job. But you said and I disagreed, because the number of cores is irrelevant -- it's the total length of the cores that counts, not the; /archives//html/Amps/2009-04/msg00366.html (7,997 bytes)
6. Re: [Amps] Sleeve Baluns FS (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Sun, 26 Apr 2009 10:18:23 -0700; It depends entirely on your definition of "a pretty decent choke." My MINIMUM definition of an ACCEPTABLE choke are the original W2DU chokes, as published on his website. Google to find it. The versi; /archives//html/Amps/2009-04/msg00368.html (8,752 bytes)

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