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1. [TenTec] Omni VII: RF in TX Audio (score: 1): Author: David and Dianne on Comcast <dhhdeh@comcast.net>; Date: Sat, 24 Oct 2009 14:20:02 -0400; Hi All, This past week I added a 'new to me' Omni VII to the shack along with the #715 speech processor. The rig has been excellent so far expect for one glitch that is avoiding any remedy I try. I a; /archives//html/TenTec/2009-10/msg00208.html (7,441 bytes)
2. Re: [TenTec] Omni VII: RF in TX Audio (score: 1): Author: alan geller <alan_geller2001@yahoo.com>; Date: Sat, 24 Oct 2009 14:53:08 -0700 (PDT); Dave, If you want a tool to understand the "why" of it, Jim Brown's tutorial on Ferrites, Baluns and Audio in http://audiosystemsgroup.com is a terrific practical guide. I would just buy a handful of; /archives//html/TenTec/2009-10/msg00213.html (8,869 bytes)
3. Re: [TenTec] Omni VII: RF in TX Audio (score: 1): Author: "Stephen Cannon" <sugar_bears_home@yahoo.com>; Date: Sat, 24 Oct 2009 19:59:24 -0600; Alan, I was wondering about the ferrite materials. My initial thought was to use 31 Material (because Material 31 is designed for HF); however, I further thought that noise in other frequency ranges; /archives//html/TenTec/2009-10/msg00214.html (9,977 bytes)
4. Re: [TenTec] Omni VII: RF in TX Audio (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>; Date: Sun, 25 Oct 2009 09:13:01 -0600; You want a lossy material at the subject frequency, not one used for transformers at the frequency to be filtered. Typically that means a considerably higher permeability for the noise filter toroid; /archives//html/TenTec/2009-10/msg00215.html (7,979 bytes)
5. Re: [TenTec] Omni VII: RF in TX Audio (score: 1): Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>; Date: Sun, 25 Oct 2009 09:31:39 -0700; The virtue of the #31 material is that when you use the right number of turns, it is effective for suppression the AM broadcast band to VHF. As noted in my tutorial (cited in an earlier post), the c; /archives//html/TenTec/2009-10/msg00216.html (8,026 bytes)
6. Re: [TenTec] Omni VII: RF in TX Audio (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Sun, 25 Oct 2009 20:27:05 -0400; Jerry, Can you suggest an appropriate compound ? Perhaps a source of same ? I suppose the big suppliers have most of this stuff available. Its not so easy to find any more - guess cause the Ham marke; /archives//html/TenTec/2009-10/msg00218.html (9,793 bytes)
7. Re: [TenTec] Omni VII: RF in TX Audio (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>; Date: Sun, 25 Oct 2009 18:49:51 -0600; Mouser is great to deal with and has a dozen catalog pages of the stuff. If you search on their web page catalog you can download data sheets to help the design. www.mouser.com Amidon is another good; /archives//html/TenTec/2009-10/msg00219.html (8,908 bytes)

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