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41. [TenTec] balanced feedline light bulb test (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue Jul 15 14:36:09 2003; LEETLE light bulbs. Flashlight or panel lamps. Then use the two wires with alligator clips on each lamp to TAP on the feed line, using a length of feedline as a current shunt to give the gossamer lam; /archives//html/TenTec/2003-07/msg00426.html (8,701 bytes)
42. [TenTec] balanced feedline light bulb test (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue Jul 15 19:36:20 2003; Who here has a matched PAIR of RF voltmeters good for transmit power? Not many compared to the number that could come up with small lamps. As far as I recall, the inductively coupled indicators don't; /archives//html/TenTec/2003-07/msg00446.html (9,023 bytes)
43. [TenTec] balanced feedline light bulb test (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue Jul 15 20:51:29 2003; Even spark wanted more antenna current by what ever means possible, hence the high capacity flat top antenna to raise the feed line current, whether it improved DX or not. 73, Jerry, K0CQ -- Entire c; /archives//html/TenTec/2003-07/msg00450.html (8,280 bytes)
44. [TenTec] balanced feedline light bulb test (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue Jul 15 23:41:55 2003; The diode capacitor and DC VOM simple RF voltmeter has fairly low impedance that can lead to forced unbalance that if the balancing circuit hasn't even impedance on both sides, the RF meter won't giv; /archives//html/TenTec/2003-07/msg00467.html (8,966 bytes)
45. [TenTec] Corsair II f.p. meter continued + other fixes (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Wed Jul 16 19:17:40 2003; Not according to my schematic. The relay is in the transmitter lead, there are only diodes and the separate receiver switch in the receiver side. 73, Jerry, K0CQ -- Entire content copyright Dr. Geral; /archives//html/TenTec/2003-07/msg00491.html (9,567 bytes)
46. [TenTec] Future TT projects (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Mon Jun 2 12:55:47 2003; IBM still sells hardware and software to the PC market, just they don't RUN the market. 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson, electrical engineer. Reproduction by permiss; /archives//html/TenTec/2003-06/msg00046.html (7,725 bytes)
47. [TenTec] Some Observations on Orion Stability/Calibration (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Mon Jun 2 12:56:25 2003; HF propagation is enough of a variable that getting to 1 Ppm precision can take averaging measurements from WWV over several days. Part of the few Hz you see can easily be coming from propagation cha; /archives//html/TenTec/2003-06/msg00047.html (8,666 bytes)
48. [TenTec] Some Observations on Orion Stability/Calibration (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Mon Jun 2 16:09:09 2003; TC stands for Temperature Compensated, NOT Temperature Controlled. So the oscillator controls should be responding to its environment. But HF propagation causes short term variations in frequency of; /archives//html/TenTec/2003-06/msg00058.html (9,308 bytes)
49. [TenTec] Future TT projects (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Mon Jun 2 21:36:56 2003; In some catalogs, IBM supplies as wide a variety of PC and laptop PC hardware as Dell or Compaq and at quite competitive prices. They may not be out front, but they are sure not a trivial player in t; /archives//html/TenTec/2003-06/msg00089.html (8,852 bytes)
50. [TenTec] Some Observations on Orion Stability/Calibration (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Mon Jun 2 21:38:22 2003; I read a compendium on frequency measurement, probably put out by the IRE or IEEE, likely 25 years ago. I think its still in a certain pile but I don't want to disturb that pile at the moment. Its no; /archives//html/TenTec/2003-06/msg00090.html (13,736 bytes)
51. [TenTec] Some Observations on Orion Stability/Calibration (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Wed Jun 4 18:07:38 2003; Ground wave at HF is as good for frequency stability as world wide propagation on 20 and 60 KHz. In fact the transmitter frequencies of WWV on HF are monitored at Boulder some miles from Ft. Collins.; /archives//html/TenTec/2003-06/msg00184.html (9,871 bytes)
52. [TenTec] Re: Orion rf gain and inherent noise (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Sun Jun 8 00:15:02 2003; There is a certain level on noise from the A/D even with no signal and a certain level of noise from the output D/A. Each is better the more bits. Sometimes tagged "quantization noise." 73, JErry, K0; /archives//html/TenTec/2003-06/msg00296.html (8,001 bytes)
53. [TenTec] Re: Orion rf gain and inherent noise (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Sun Jun 8 19:16:48 2003; Quantization noise come from making analog signals into discrete digital steps. I don't think its a problem of noise from hot circuits that could be helped by cooling. Besides cooling works best when; /archives//html/TenTec/2003-06/msg00319.html (8,226 bytes)
54. [TenTec] Need Help. (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Thu Jun 12 10:12:42 2003; Could be the antenna no longer is tunable on 20m. The tuner can't tune every length of wire. 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson, electrical engineer. Reproduction by pe; /archives//html/TenTec/2003-06/msg00418.html (6,784 bytes)
55. [TenTec] Ten-Tec 2591 (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Sat Jun 14 23:00:26 2003; Digi-Key makes custom battery assemblies that you can install in the Ten-Tec case. Likely they originally were 450 mah AA nicads in a group of 6 or 8, mostly like two layers of 3 or 4 all series conn; /archives//html/TenTec/2003-06/msg00482.html (7,141 bytes)
56. [TenTec] Omni6+ roofing filter (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Mon Jun 16 22:24:20 2003; Its really NO mystery why a narrow "roofing" filter didn't help. It just means that the IMD isn't limited by the first IF and second mixer whether close in or with wide spread signals. It means that; /archives//html/TenTec/2003-06/msg00534.html (12,741 bytes)
57. [TenTec] Orion Bottom Cover (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Mon Jun 16 22:24:30 2003; So MAYBE one could improve the temperature stability of the TCXO environment. First step, surround the TCXO with a block of Dow blue board (or white or gray). That will slow the effect environmental; /archives//html/TenTec/2003-06/msg00535.html (8,729 bytes)
58. [TenTec] Omni6+ roofing filter (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue Jun 17 10:43:28 2003; One other reason for roofing filter bandwidth is the noise blanker. Narrower and/or steeper skirted broadens out the noise impulses making them harder to detect and strip out. 73, Jerry, K0CQ -- Enti; /archives//html/TenTec/2003-06/msg00540.html (8,081 bytes)
59. [TenTec] Omni V & VI MIXER Question (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue Jun 24 22:26:35 2003; 23 dBm means 23 dBm LO power. 200 milliwatts. at least the 17 dBm mixer only needs 50 milliwatts. That would be the biggest problem with using the higher power mixer. The next problem probably is tha; /archives//html/TenTec/2003-06/msg00749.html (7,401 bytes)
60. [TenTec] Omni V & VI MIXER Question (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue Jun 24 22:54:27 2003; It very well could be that the mixer is already running at more than nameplate local oscillator power. Hence the heating. I won't be jacking up the power to that mixer because I don't like some detai; /archives//html/TenTec/2003-06/msg00755.html (7,293 bytes)

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