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1. [TenTec] Tx IMD and Purity (score: 1): Author: Kimberly Elmore <cw_de_n5op@sbcglobal.net>; Date: Mon, 1 Jul 2013 10:14:48 -0700 (PDT); Rick, you make an excellent point! Are you speaking of only IMD performance? If so, how good is good enough? Speaking only of 3rd order (O3) IMD, my old TS-930S has O3 IMD of -35 dB while my Orion II; /archives//html/TenTec/2013-07/msg00023.html (26,665 bytes)
2. Re: [TenTec] Tx IMD and Purity (score: 1): Author: "Bob McGraw - K4TAX" <RMcGraw@Blomand.net>; Date: Mon, 1 Jul 2013 12:50:45 -0500; I don't think designers are cutting corners on PA designs. There are limits as to what can be obtained with a 12V radio design. Thus I do think, even for a 100 watt radio, we need to get away from 12; /archives//html/TenTec/2013-07/msg00027.html (26,037 bytes)
3. Re: [TenTec] Tx IMD and Purity (score: 1): Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>; Date: Mon, 1 Jul 2013 19:59:16 +0200; Kim, Why do we even talk about 3rd order IMD? Does anybody even know? The answer is obvious: the rules define specs for that, so that's what we talk about. The 3rd order IMD is measured with a two to; /archives//html/TenTec/2013-07/msg00029.html (29,354 bytes)
4. Re: [TenTec] Tx IMD and Purity (score: 1): Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>; Date: Mon, 1 Jul 2013 20:14:08 +0200; BINGO (Bob) All medium and large box radios should run off of 48v. Not sure why you said it has to be built in. The Drake L4B has an external PS for several thousand volts. I think most people can ha; /archives//html/TenTec/2013-07/msg00031.html (32,003 bytes)
5. Re: [TenTec] Tx IMD and Purity (score: 1): Author: "Robert Mcgraw" <rmcgraw@blomand.net>; Date: Tue, 2 Jul 2013 07:57:28 -0500 (CDT); Rick, on point #1, why internal? .....less boxes, less cables, less connectors, reduced or eliminated ground issues between equipment, dedicated power supply designed to do the job and not some kludg; /archives//html/TenTec/2013-07/msg00055.html (11,547 bytes)
6. Re: [TenTec] Tx IMD and Purity (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Tue, 02 Jul 2013 09:48:26 -0700; On 7/1/2013 10:50 AM, Bob McGraw - K4TAX wrote: There are limits as to what can be obtained with a 12V radio design. Thus I do think, even for a 100 watt radio, we need to get away from 12V radios. N; /archives//html/TenTec/2013-07/msg00060.html (12,986 bytes)
7. Re: [TenTec] Tx IMD and Purity (score: 1): Author: Richards <jrichards@k8jhr.com>; Date: Tue, 02 Jul 2013 19:45:50 -0400; Gentlemen. Re: higher voltage circuits... would it be too difficult to develop a power supply, maybe a linear type, that outputs two different voltages for different parts of the radio? Specifically,; /archives//html/TenTec/2013-07/msg00063.html (11,395 bytes)
8. Re: [TenTec] Tx IMD and Purity (score: 1): Author: "Robert Mcgraw" <rmcgraw@blomand.net>; Date: Tue, 2 Jul 2013 18:59:48 -0500 (CDT); With current switching power supply technology and methods, the dual and bipolar and different voltage supplies is a real easy off the shelf project. For the life of me, I can't see why anyone/compan; /archives//html/TenTec/2013-07/msg00064.html (12,897 bytes)

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