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81. Re: [TenTec] More help needed on Shure 450 (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Sun, 02 Jul 2006 10:34:08 -0500; It doesn't matter which one, so long as the other goes to ground. The switch is floating so it can be wired for more applications. Though I'm fairly sure the radio needs a ground on PTT to transmit,; /archives//html/TenTec/2006-07/msg00020.html (8,750 bytes)
82. Re: [TenTec] Still no luck with 450 Shure hookup.Help (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Sun, 02 Jul 2006 21:52:36 -0500; I thought I said that the red and black were the two contacts of the PTT switch that are isolated from ground. For radio use, hook on to the PTT circuit and the other to ground. Doesn't make any diff; /archives//html/TenTec/2006-07/msg00027.html (8,874 bytes)
83. Re: [TenTec] Sweep on Orion II (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Mon, 03 Jul 2006 10:17:45 -0500; Frequency control is the injected carrier frequency, not mid spectrum. Received audio for SSB peaks at 1.8 KHz, not DC. That spectrum peak will vary with the voice observed, the microphone in use, th; /archives//html/TenTec/2006-07/msg00033.html (12,340 bytes)
84. Re: [TenTec] Temporarily disabling Argonaut V transmitter (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Mon, 03 Jul 2006 21:17:50 -0500; I several of my radios, all that is necessary for local code practice is to disable VOX during CW for practice. How that's done depends on the radio and its menus or lack of menus. I don't know about; /archives//html/TenTec/2006-07/msg00049.html (8,546 bytes)
85. Re: [TenTec] Sweep on Orion II (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Mon, 03 Jul 2006 21:19:14 -0500; No, you didn't imagine that. That was AM with two side bands and full carrier. SSB spectra don't work out that way. -- 73, Jerry, K0CQ, All content copyright Dr. Gerald N. Johnson, electrical enginee; /archives//html/TenTec/2006-07/msg00050.html (8,433 bytes)
86. Re: [TenTec] Lousy eHam review (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Mon, 03 Jul 2006 21:25:31 -0500; Even in macrame done in private for home use, there will eventually appear a critic who will disagree with your choices of material, colors, knots, design, and will consider your workmanship unworthy; /archives//html/TenTec/2006-07/msg00051.html (9,602 bytes)
87. Re: [TenTec] OMNI6+ SSB transmit quality - HELP! (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Tue, 04 Jul 2006 19:01:13 -0500; Well, there may be room for some more detailed troubleshooting. What are you using for microphone? What is its impedance? What is the radio input impedance, and how capacitance is across the micropho; /archives//html/TenTec/2006-07/msg00083.html (10,717 bytes)
88. Re: [TenTec] 6N2 observations (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Fri, 07 Jul 2006 10:59:15 -0500; The 6N2 should have a quiet receiver. Its MDS specification is 10 dB poorer than a rice box on 2m and 2m rice boxes are at least 10 dB poorer than 2m atmospheric noise in mid USA and more than 10 dB; /archives//html/TenTec/2006-07/msg00167.html (8,287 bytes)
89. Re: [TenTec] preventing keyclicks on an Orion I (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Sun, 09 Jul 2006 09:53:06 -0500; How hard is everyone driving the ALC? Driving ALC hard on CW will shorten the output rise time. And some suggest that CW driving the AC hard can lead to oscillations in the envelope right where the r; /archives//html/TenTec/2006-07/msg00190.html (8,081 bytes)
90. Re: [TenTec] Scout on 60-meters? (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Sun, 09 Jul 2006 09:58:38 -0500; While a low pass filter on the PTO output will keep it clean going into thee mixer, most mixers create considerable harmonic internally. It may be necessary to go away from direct frequency read out; /archives//html/TenTec/2006-07/msg00191.html (8,245 bytes)
91. Re: [TenTec] Orion key clix... (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Sun, 09 Jul 2006 11:07:22 -0500; Are you driving a final either in the radio or external? Are you not using ALC? Then how are you preventing that PA from being driven to clipping and creating clicks from that clipping? -- 73, Jerry,; /archives//html/TenTec/2006-07/msg00193.html (8,074 bytes)
92. Re: [TenTec] 6N2 observations (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Sun, 09 Jul 2006 16:47:10 -0500; A preamp at the antenna is ideal, however the performance of the 6N2 is so far from the state of the art that it may take two preamps. The problem with a preamp at the antenna is it often has insuffi; /archives//html/TenTec/2006-07/msg00198.html (9,006 bytes)
93. Re: [TenTec] Orion key clix... (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Sun, 09 Jul 2006 17:46:25 -0500; No, I've not seen an Orion. But having an RF output level adjustment to me says it may well have an ALC function in the software and hardware. Its been the best solution to controlling output power b; /archives//html/TenTec/2006-07/msg00199.html (9,335 bytes)
94. Re: [TenTec] 6N2 observations (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Sun, 09 Jul 2006 21:43:58 -0500; 2 dB is a great deal better than 12 dB the 6N2 seems to provide. MDS 10 dB poorer than the anemic Ft-736. To get to 0.5 dB NF from 2 dB isn't too hard, but from 12 dB its a real pain, with way too mu; /archives//html/TenTec/2006-07/msg00209.html (10,976 bytes)
95. Re: [TenTec] My take on how to "fix" the Orion. (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Wed, 12 Jul 2006 11:38:24 -0500; <SNIP> Agreed. -- 73, Jerry, K0CQ, All content copyright Dr. Gerald N. Johnson, electrical engineer _______________________________________________ TenTec mailing list TenTec@contesting.com http://li; /archives//html/TenTec/2006-07/msg00261.html (8,795 bytes)
96. Re: [TenTec] The Age of Consumer Beta Testing (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Wed, 12 Jul 2006 12:52:00 -0500; <SNIP> There is a setting in windoze that defaults to checking a drive for contents to see if its changed. When you swap drives out as some laptops can do hot that causes a crash. Sometimes it also c; /archives//html/TenTec/2006-07/msg00274.html (9,420 bytes)
97. Re: [TenTec] repairs (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Thu, 13 Jul 2006 19:41:22 -0500; Its not oscillation, its merely the effects of off impedance loads on the PA. And the PA is protected by the power supply, either current limit or circuit breaker.Its a design CHOICE, not a design fa; /archives//html/TenTec/2006-07/msg00386.html (9,474 bytes)
98. Re: [TenTec] SDR-1000 (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Thu, 13 Jul 2006 20:04:54 -0500; You might want to control the antenna tuners as their tuning process always introduces phase shift. That's how broadcast array drive networks are tuned, with T, pi or L networks to introduce the the; /archives//html/TenTec/2006-07/msg00396.html (12,153 bytes)
99. Re: [TenTec] SDR-1000 (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Thu, 13 Jul 2006 21:30:58 -0500; The noise floor is not a stable signal level, nor uniform over the world. There are quiet locations and quiet times, some predictable, and some not. Then there may be some signal processing technique; /archives//html/TenTec/2006-07/msg00398.html (8,929 bytes)
100. Re: [TenTec] "will SDR be here tomorrow." (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Fri, 14 Jul 2006 12:57:36 -0500; Actually, E. F. Johnson and Collins are still in business, just not in the ham business. Heath, too, but only in the manual's business. The last Hallicrafters was brought out under new conglomerate o; /archives//html/TenTec/2006-07/msg00420.html (16,522 bytes)

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