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181. Re: [TenTec] Corsair II buzz (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Thu, 02 Apr 2009 18:13:17 -0700; The most common source of "buzz" consists of "triplen" harmonics of the AC power line, coupled from the 3-phase power line that is probably providing your residential service. See my recommendations; /archives//html/TenTec/2009-04/msg00029.html (10,094 bytes)
182. Re: [TenTec] Corsair II buzz (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Thu, 02 Apr 2009 20:15:43 -0700; What you have described could very well be high leg Delta -- you just don't have the 3rd phase brought down your road. because no one needs it. 73, Jim Brown K9YC ____________________________________; /archives//html/TenTec/2009-04/msg00036.html (9,481 bytes)
183. Re: [TenTec] Corsair II buzz (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Thu, 02 Apr 2009 20:20:23 -0700; Yes. But -- the bonding shorts out the buzz, so the shorter the conductors and the larger they are,the less buzz is left. The second component of my advice is to get all power for the station from ou; /archives//html/TenTec/2009-04/msg00037.html (9,201 bytes)
184. Re: [TenTec] Corsair II buzz (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Fri, 03 Apr 2009 07:42:30 -0700; Gary, Do you have access to any form of audio FFT? I'm thinking of software that could run on your laptop using the sound card. Laptop is important, because it can run on battery and independent of t; /archives//html/TenTec/2009-04/msg00041.html (9,650 bytes)
185. [TenTec] RF Ground (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Fri, 03 Apr 2009 21:35:11 -0700; The words "RF ground" have NO MEANING in science. They are a fignewton of fuzzy thinking. A connection to EARTH is totally irrelevant for a radio transmitter, receiver, or antenna. A connection to e; /archives//html/TenTec/2009-04/msg00050.html (10,106 bytes)
186. Re: [TenTec] RF Ground (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Sat, 04 Apr 2009 12:55:01 -0700; But a Faraday cage is NOT a solution to the fundamental problem -- RF CURRENT flowing where we don't want it. A Faraday cage addresses the E field (capacitive coupling) and poor shielding. The E-fiel; /archives//html/TenTec/2009-04/msg00059.html (9,233 bytes)
187. Re: [TenTec] RF Ground (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Sat, 04 Apr 2009 22:05:03 -0700; Yes, you did, absolutely correct. I agree completely. I was keying in on the RF Ground idea and forgot to reinforce your many excellent comments. Sorry, Bob. My bad. The "pin 1 problem" is a mis-term; /archives//html/TenTec/2009-04/msg00077.html (10,086 bytes)
188. Re: [TenTec] RF Ground (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Sat, 04 Apr 2009 22:12:43 -0700; Actually, coax is the BEST feedline for a dipole, BECAUSE you can kill common mode current on it VERY effectively with a ferrite choke, You cannot do that with twinlead -- way too much leakage flux.; /archives//html/TenTec/2009-04/msg00078.html (10,302 bytes)
189. Re: [TenTec] RF Ground (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Sat, 04 Apr 2009 22:19:02 -0700; It is a large conductive object to which lightning often wants to discharge. YES! And it is VERY important is that all of those parallel paths be bonded together, so that in the case of a strike, the; /archives//html/TenTec/2009-04/msg00079.html (9,227 bytes)
190. Re: [TenTec] RF Ground (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Sat, 04 Apr 2009 22:25:21 -0700; Yes and no. When we write equations and draw equivalent circuits, we can certainly pick any point we wish as a reference. BUT -- mother nature does care about our equations, or how we talk about or t; /archives//html/TenTec/2009-04/msg00080.html (8,971 bytes)
191. Re: [TenTec] Faraday cage (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Sat, 04 Apr 2009 22:34:32 -0700; Yes. A Faraday cage is, by definition, an Electric shield. It is NOT a magnetic shield at low frequencies. In the near field of a field produced by current, the field is primarily a magnetic field.; /archives//html/TenTec/2009-04/msg00081.html (10,719 bytes)
192. Re: [TenTec] RF Ground (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Sun, 05 Apr 2009 12:01:49 -0700; I do, for three reasons. RF in the shack, RF in my living room and my neighbor's living room, and, VERY important, noise coupled from reception on the coax to the antenna to the RX. IF the coax is co; /archives//html/TenTec/2009-04/msg00095.html (11,441 bytes)
193. Re: [TenTec] RF Ground (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Mon, 06 Apr 2009 18:08:16 -0700; Re: the tower 350 ft from the house. I would bond the ground rods at the tower to the service entrance ground. I would bond the coax to the ground rods at the base of the tower, put a big ferrite cho; /archives//html/TenTec/2009-04/msg00133.html (10,058 bytes)
194. Re: [TenTec] RF Ground (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Tue, 07 Apr 2009 08:59:58 -0700; It is a mistake to think "all or nothing" with respect to the 18-inch copper or copper pipe. Nothing wrong with those recommendations, but something like #10 or #6 copper is FAR better than NOTHING b; /archives//html/TenTec/2009-04/msg00139.html (10,713 bytes)
195. Re: [TenTec] Aux I/O connection (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Mon, 20 Apr 2009 00:11:02 -0700; See http://audiosystemsgroup.com/HamInterfacing.pdf and http://audiosystemsgroup.com/RFI-Ham.pdf for detailed answers to your questions. 73, Jim Brown K9YC ___________________________________________; /archives//html/TenTec/2009-04/msg00263.html (8,873 bytes)
196. Re: [TenTec] OT: Phonetics (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Sun, 17 May 2009 08:23:08 -0700; I suggest that YOU go back and study the definitions of the RST system. A report of 47 does NOT mean you are a whisper. 229 means you are a whisper, and if you send your call enough times, I might fi; /archives//html/TenTec/2009-05/msg00147.html (7,652 bytes)
197. Re: [TenTec] Mic Element (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Sat, 13 Jun 2009 22:42:50 -0700; Any relationship between EV and this mic is at least 40 years old, and no one who was there then still works for EV (and many are dead). Forget that connection. Ten Tec rigs, in general, work very we; /archives//html/TenTec/2009-06/msg00059.html (8,497 bytes)
198. Re: [TenTec] [TEN TEC] Centaur/ Centurion/Orion relays (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Mon, 29 Jun 2009 10:26:08 -0700; Yes. I use Jennings or their Gigavac equivalents in my Titans and Herc II, and they're reasonably quiet. I always work with headphones, and I don't hear them, although I've done nothing special to pr; /archives//html/TenTec/2009-06/msg00148.html (8,293 bytes)
199. Re: [TenTec] Computer Interface for the Omni VI (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Tue, 30 Jun 2009 07:32:47 -0700; All you need is a straight through connection of the wires that are on pins 2 and 3 of the DB9 to their respective pins on the DB25, plus a connection from shell of the DB9 to shell of the DB25. Usin; /archives//html/TenTec/2009-06/msg00176.html (8,811 bytes)
200. Re: [TenTec] possible power supply for Herc II? (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Wed, 05 Aug 2009 22:41:45 -0700; I have a Hercules II, but have never even see a 9420. Several observations. The Herc II is quite well protected. The Herc II will hit rated power with less than 70A. That suggests a single Astron rat; /archives//html/TenTec/2009-08/msg00043.html (9,096 bytes)

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