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201. [TenTec] Adding band to Omni D Series B (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Wed, 19 Jun 2002 08:15:28 -0500; The 546-C schematic I have says the crystal for 18 MHz is 4.0 MHz. That's the one with the strong spur. What does your manual show for the 18 MHz crystal? 73, Jerry, K0CQ -- Entire content copyright; /archives//html/TenTec/2002-06/msg00294.html (8,371 bytes)
202. [TenTec] Adding band to Omni D Series B (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Wed, 19 Jun 2002 08:41:32 -0500; Fixing should; require two changes. Change the crystal to 22.0 MHz. Change the coil and capacitor on the PTO mixer output for 18 Mhz to one that tunes to 27 MHz. Maybe change the counter initializati; /archives//html/TenTec/2002-06/msg00296.html (9,584 bytes)
203. [TenTec] Pegasus keyer (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Fri, 28 Jun 2002 12:12:16 -0500; Switched to straight key mode? 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson. Reproduction by permission only.; /archives//html/TenTec/2002-06/msg00479.html (6,634 bytes)
204. [TenTec] In Rush Protection (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Sun, 30 Jun 2002 09:55:46 -0500; There can be some inrush protection inherent in the separate transformer. The resistance of a tungsten filament is 12 to 15 times higher at operating temperature than at room temperature. This change; /archives//html/TenTec/2002-06/msg00506.html (7,647 bytes)
205. [TenTec] Stuff needed (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Wed, 01 May 2002 17:45:54 -0500; RS carries the microphone connector (common for CB). Other places like Mouser too. 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson. Reproduction by permission only.; /archives//html/TenTec/2002-05/msg00025.html (6,675 bytes)
206. [TenTec] SO2R with Ten Tecs? (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Mon, 06 May 2002 12:44:25 -0500; The Corsair II already has the separate receiver antenna jack. No mods needed, just open a switch on the back panel and hook the input to the auxiliary receiver jack. 73, Jerry, K0CQ -- Entire conten; /archives//html/TenTec/2002-05/msg00085.html (7,022 bytes)
207. [TenTec] SO2R with Ten Tecs? (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Mon, 06 May 2002 22:25:58 -0500; There IS isolation IF and only IF you throw the RX/TRX switch on the back panel that causes the isolation. If you leave that switch connected, transmitter RF may show on the receiver input jack. Thou; /archives//html/TenTec/2002-05/msg00105.html (8,854 bytes)
208. [TenTec] TEN TEC PTO REBUILD! (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue, 07 May 2002 16:46:57 -0500; Just one addition suggestion. Work in a tray with raised sides to slow down the rolling parts leaving. 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson. Reproduction by permission on; /archives//html/TenTec/2002-05/msg00135.html (6,567 bytes)
209. [TenTec] RE: Explication (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Sun, 19 May 2002 09:58:52 -0500; I disagree. There is nothing in the circuits of the diode detector and the modern product detector that has any phase setting of the audio recovered signal. If anything, the product detector (a good; /archives//html/TenTec/2002-05/msg00352.html (8,245 bytes)
210. [TenTec] Re: Dayton news: Orion concern (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Sun, 19 May 2002 22:11:35 -0500; The demand for a sturdy flywheel/knob harks back to the 50s and 60s when the fine radios had neat gear drives and sturdy flywheels so we users couldn't feel the gear teeth. Those radios tended to be; /archives//html/TenTec/2002-05/msg00377.html (7,838 bytes)
211. [TenTec] Re: Orion Concern (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Mon, 20 May 2002 01:10:16 -0500; Actually the designer of the green round cornered Heathkits had worked on the S-Line at Collins, so they have some of the same heritage. There were certain things used in Collins (PTO and mechanical; /archives//html/TenTec/2002-05/msg00381.html (9,565 bytes)
212. [TenTec] New bands (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Mon, 20 May 2002 10:03:29 -0500; ARRL bulletin that I saw on packet said 5.25 to 5.4 MHz. 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson. Reproduction by permission only.; /archives//html/TenTec/2002-05/msg00399.html (6,710 bytes)
213. [TenTec] what is "quiet"? (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue, 02 Apr 2002 00:45:09 -0600; Part of the difference is in the crystal or mechanical filters ringing from static converting clicks to crasssssh. Tentec filters don't do that so much and so seem quieter. 73, Jerry, K0CQ -- Entire; /archives//html/TenTec/2002-04/msg00052.html (9,477 bytes)
214. [TenTec] what is "quiet"? (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue, 02 Apr 2002 12:11:27 -0600; Tchebychev filter approximations with steep skirts have a rotten time response. They DO smear pulses into crashes. The Collins mechanical filter in my 75S3B smears the 360 Hz repetition rate pulses o; /archives//html/TenTec/2002-04/msg00068.html (11,256 bytes)
215. [TenTec] what is "quiet"? (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue, 02 Apr 2002 12:45:42 -0600; Yes, the single conversion receiver with filters at both ends of the IF strip (or a single signal phasing detector such as KK7B's R2 or R2PRO or R2mini http://www.bright.net/~kanga/kanga/kk7b.htm to; /archives//html/TenTec/2002-04/msg00070.html (9,958 bytes)
216. [TenTec] what is "quiet"? (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue, 02 Apr 2002 16:18:26 -0600; The K2 is NOT direct conversion. Its a single conversion superhet, IF at 4.9152 Mhz. 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson. Reproduction by permission only.; /archives//html/TenTec/2002-04/msg00083.html (9,079 bytes)
217. [TenTec] what is "quiet"? (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue, 02 Apr 2002 16:48:56 -0600; 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson. Reproduction by permission only.; /archives//html/TenTec/2002-04/msg00087.html (9,277 bytes)
218. [TenTec] My own little "quiet test" (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue, 02 Apr 2002 23:54:30 -0600; One should compare a terminated RF stage to the antenna, not an open antenna connector. In many RF stages, especially those critically matched for best noise figure, changing the source impedance cha; /archives//html/TenTec/2002-04/msg00112.html (7,872 bytes)
219. [TenTec] I.C.E. BCB Filter does the trick (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Sat, 06 Apr 2002 13:41:04 -0600; I suppose a hint to one of the other stations on the same channel would cause a check of distant signal strength and a complaint to the FCC about the stations that neglected to drop their power at ni; /archives//html/TenTec/2002-04/msg00192.html (7,860 bytes)
220. [TenTec] Rig Chart (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Sun, 07 Apr 2002 10:44:32 -0500; Phase noise has multiple characteristics. When coming from an analog oscillator its pretty much random noise, causing a spreading of the signal. And that can lead to strong adjacent frequency signals; /archives//html/TenTec/2002-04/msg00208.html (9,909 bytes)

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