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141. [TenTec] Pegasus S-Meter Anomaly (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue Jan 28 22:38:20 2003; It may be that there are two AVC loops. I'd expect one working at RF to protect the A/D from being overdriven, and a second one working after detection and filtering to level the audio for the speake; /archives//html/TenTec/2003-01/msg00626.html (7,947 bytes)
142. [TenTec] Pegasus S-Meter Anomaly (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Wed Jan 29 01:07:56 2003; The splatter could have been from an overdriven Collins rig, or an overdriven A/D. The envelope of the SSB signal also follows the syllabic variations of the audio signal, so a fast AVC would show sy; /archives//html/TenTec/2003-01/msg00630.html (7,731 bytes)
143. [TenTec] Pegasus S-Meter Anomaly (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Wed Jan 29 11:54:06 2003; It would be logical to me for the RF AGC to be fast while the audio AGC was slow and for the RF AGC to be faster on strong signals to protect the A/D better. The DSP always works better with the stro; /archives//html/TenTec/2003-01/msg00645.html (8,445 bytes)
144. [TenTec] Corsair II AGC - had pop? If so, mods? (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Wed Jan 29 14:53:21 2003; If I run it will full RF gain on a really good antenna and fast AGC there can be some popping on really strong CW. There's enough time delay in the 16 poles of filter that the gain control before the; /archives//html/TenTec/2003-01/msg00652.html (7,189 bytes)
145. [TenTec] SWR, and meters (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Wed Jan 29 20:16:17 2003; Many so called SWR meters are rough approximations and their error depends to a great degree on the local voltage and current on the line. A good meter would use those to derive power, but the monima; /archives//html/TenTec/2003-01/msg00667.html (10,674 bytes)
146. [TenTec] Jupiter SWR, and VSWR generally (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Wed Jan 29 22:10:07 2003; I've not been able to identify the diodes Bird uses. They seem to have a far lower threshold voltage than ordinary HP Schottky diodes. I have had a few low power Bird slugs needing diodes. A common p; /archives//html/TenTec/2003-01/msg00672.html (7,831 bytes)
147. [TenTec] DeOxit - Corsair II (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Thu Jan 30 14:58:37 2003; Don't spray. Buy the micrdropper bottle and apply only to the metal contacts. Its effective there, but detrimental to the insulation. 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson; /archives//html/TenTec/2003-01/msg00688.html (6,632 bytes)
148. [TenTec] Disparaging Corsairs, Pro II, etc hi hi (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Thu Jan 30 21:59:38 2003; The TS850 was quite a bit later than the TS930. The 850 has performed well, it had better reviews, especially in Europe than most other radios of the era. The TS930 seems to like to self destruct, th; /archives//html/TenTec/2003-01/msg00699.html (8,593 bytes)
149. [TenTec] Corsairs, Pro II, etc hi hi....interesting replies! (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Fri Jan 31 15:21:45 2003; Both RSGB and the DL club magazine reviews of the 850 were most complimentary about the radio's handling of strong adjacent frequency signals. Glowing to be more precise. It was the best they'd ever; /archives//html/TenTec/2003-01/msg00744.html (8,429 bytes)
150. [TenTec] Corsairs, Pro II, etc hi hi....interesting replies! (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Fri Jan 31 17:37:53 2003; Sherwood (who sells receiver modifications) has a web page with many such IP3, dynamic range and phase noise tests. Many of the early (50s and 60s) radios didn't perform well. Often limited by the sm; /archives//html/TenTec/2003-01/msg00749.html (13,006 bytes)
151. [TenTec] Corsairs, Pro II, etc hi hi (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Fri Jan 31 17:43:11 2003; I'm not convinced the receivers ten years from now will have better performance. I fear that they will have greater versatility at the cost of poorer performance. Many steps supposedly forward in the; /archives//html/TenTec/2003-01/msg00750.html (8,573 bytes)
152. [TenTec] Scout DC Supply Voltage sensitivity (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Fri, 01 Nov 2002 17:42:00 -0600; Why should the PA draw MORE current on low voltage? If its being driven for all the impedance matching transformer can do, then the load line resistance is constant with supply voltage and the curren; /archives//html/TenTec/2002-11/msg00017.html (9,811 bytes)
153. [TenTec] Scout DC Supply Voltage sensitivity (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Fri, 01 Nov 2002 19:22:27 -0600; Its easy for a bit of excess voltage drop in fuses and back panel connectors (I seem to recall some comments in the past about those back panel connectors being a real problem in some Scouts) to drop; /archives//html/TenTec/2002-11/msg00021.html (9,971 bytes)
154. [TenTec] Supply Voltage sensitivity. >=12.0Vdc (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Sat, 02 Nov 2002 10:12:37 -0600; Doesn't need to be an "inverter" just a booster. Which could be a step down transformer coupled switcher making a variable output to be wired in series with the battery, or just a boost regulator whe; /archives//html/TenTec/2002-11/msg00024.html (9,432 bytes)
155. [TenTec] Scout DC Supply Voltage sensitivity (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Mon, 04 Nov 2002 20:14:27 -0600; What is the lowest voltage your "low voltage" scout will run on? 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson, electrical engineer. Reproduction by permission only.; /archives//html/TenTec/2002-11/msg00076.html (8,226 bytes)
156. [TenTec] Scout DC Supply Voltage sensitivity (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Mon, 04 Nov 2002 22:39:40 -0600; Then those Scouts that drift at 12+ volts could be helped by changing to that LM2940 chip. Maybe in Mouser, 511-L4940V10 for 10 volts output. To replace LM7810 in TO-220 package. 73, Jerry, K0CQ -- E; /archives//html/TenTec/2002-11/msg00081.html (8,471 bytes)
157. [TenTec] Scout DC Supply Voltage sensitivity (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue, 05 Nov 2002 20:51:09 -0600; The classic LM7810 needs 2 to 2.5 volts minimum drop. When the input voltage gets too low, the regulator acts as a constant voltage drop, so any ripple on the input shows on the then unregulated outp; /archives//html/TenTec/2002-11/msg00116.html (8,774 bytes)
158. [TenTec] Transistor Question? (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Wed, 02 Oct 2002 17:52:34 -0500; I don't find any MPSV transistors. MPSU10 is in the ECG cross reference. Its replaced by an ECG 191, discontinued. No data in this book, was a Si NPN HV AF/Video amp in figure T36 case... Also not sh; /archives//html/TenTec/2002-10/msg00038.html (6,953 bytes)
159. [TenTec] CW Filters (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue, 08 Oct 2002 21:14:07 -0500; No number of cascaded IF filters will cure front end overload. 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson, electrical engineer. Reproduction by permission only.; /archives//html/TenTec/2002-10/msg00191.html (6,522 bytes)
160. [TenTec] TWINCOM feedline ????????????? (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Mon, 14 Oct 2002 18:46:59 -0500; Incredibly stretched truth. It has much affinity with the solid byproducts of a male bovine. Any alloy of aluminum has poorer conductivity than aluminum. Any alloy with lots of titanium will likely b; /archives//html/TenTec/2002-10/msg00270.html (9,583 bytes)

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