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Total 21 documents matching your query.

1. [TenTec] Corsair II buzz (score: 1): Author: "Gary Smith" <Gary@doctorgary.net>; Date: Thu, 02 Apr 2009 10:01:53 -0400; I've got a Corsair II I'm planning on recapping with Ultra Low ESR electrolytics. There's a high pitched buzz I can hear which is distracting somewhat but is mostly absent when the narrow filters are; /archives//html/TenTec/2009-04/msg00020.html (7,585 bytes)
2. Re: [TenTec] Corsair II buzz (score: 1): Author: yash@aol.com; Date: Thu, 02 Apr 2009 10:09:51 -0400; Gary ?I found my corsair II to pick up a hum/buzz if the supply is close to the rig ,moved it 3 feet away and all seems ok now. That was a 961? tt supply. Maybe comming from a source in your house? g; /archives//html/TenTec/2009-04/msg00021.html (8,273 bytes)
3. Re: [TenTec] Corsair II buzz (score: 1): Author: "Bob McGraw - K4TAX" <RMcGraw@Blomand.net>; Date: Thu, 2 Apr 2009 09:50:37 -0500; First, I'd say the Ultra Low ESR caps are likely overkill. As to the buzz, does it exist with the volume control all the way down? If so it is likely power supply induced otherwise, likely from the I; /archives//html/TenTec/2009-04/msg00022.html (8,729 bytes)
4. Re: [TenTec] Corsair II buzz (score: 1): Author: Stan Barr <g0clv@dsl.pipex.com>; Date: Thu, 02 Apr 2009 16:02:22 +0100; I had that problem when the psu was on the right of the rig. Moving it to the left cured it. -- Cheers and 73, Stan Barr G0CLV G-QRP 3369 g0clv@dsl.pipex.com "Never leave well enough alone." - Raymon; /archives//html/TenTec/2009-04/msg00023.html (9,249 bytes)
5. Re: [TenTec] Corsair II buzz (score: 1): Author: "Bob McGraw - K4TAX" <RMcGraw@Blomand.net>; Date: Thu, 2 Apr 2009 10:14:53 -0500; That's one reason I've changed to switching power supplies for all of the needs of my stations. No transformer hum, much higher efficiency. And the ones I've chosen do not produce objectionable RF pr; /archives//html/TenTec/2009-04/msg00024.html (10,208 bytes)
6. Re: [TenTec] Corsair II buzz (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Thu, 02 Apr 2009 10:42:00 -0600; As a buzz, its not a sinewave but something sawtooth or square with lots of harmonics? The only part of the radio that does that is the display board (and keyer). And that board is known to fail to w; /archives//html/TenTec/2009-04/msg00025.html (8,458 bytes)
7. Re: [TenTec] Corsair II buzz (score: 1): Author: "Gary Smith" <Gary@doctorgary.net>; Date: Thu, 02 Apr 2009 15:24:02 -0400; Thanks for the replies. I have a slew of new ultra low ESR electrolytics and I feel more than safe in exchanging the old ones with this newer technology and the quality of these are mighty close to S; /archives//html/TenTec/2009-04/msg00026.html (9,288 bytes)
8. 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)
9. Re: [TenTec] Corsair II buzz (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Thu, 2 Apr 2009 21:50:18 -0400; Hmmm....in our neighborhood we certainly have nothing remotely like a 240 v delta system serving residences, being center tapped and all as mentioned below. What we have are moderately high voltage l; /archives//html/TenTec/2009-04/msg00030.html (11,494 bytes)
10. Re: [TenTec] Corsair II buzz (score: 1): Author: <waltk8cv4612amos@att.net>; Date: Thu, 2 Apr 2009 22:21:28 -0400; ALL the stuff here is 13,200 V .............. Primary ! Walt K8CV Royal Oak, MI. _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/; /archives//html/TenTec/2009-04/msg00031.html (13,377 bytes)
11. Re: [TenTec] Corsair II buzz (score: 1): Author: Bwana Bob <wb2vuf@gti.net>; Date: Thu, 02 Apr 2009 21:38:54 -0500; Yes, the magnetic field from the power supply will frequency modulate the PTO coil, making received and transmitted signals sound bad. This happened to me when I stacked the Corsair on top of the ext; /archives//html/TenTec/2009-04/msg00032.html (10,779 bytes)
12. Re: [TenTec] Corsair II buzz (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Thu, 2 Apr 2009 22:39:06 -0400; yep....you are further up the ladder than we are way out here in the country. I sometimes think we get the last electron left on the vine, so to speak :) Certainly its true that many areas use higher; /archives//html/TenTec/2009-04/msg00033.html (14,716 bytes)
13. Re: [TenTec] Corsair II buzz (score: 1): Author: "Bob McGraw - K4TAX" <RMcGraw@Blomand.net>; Date: Thu, 2 Apr 2009 21:41:33 -0500; Actually and most likely there are three phases in the neighborhood. Each transformer has a single line connected to one phase to provide step-down to 240 volts center tapped. The next group of homes; /archives//html/TenTec/2009-04/msg00034.html (15,049 bytes)
14. Re: [TenTec] Corsair II buzz (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Thu, 2 Apr 2009 23:08:52 -0400; I guess this just goes to show how much things vary from place to place. I just strolled out to the pole to reassure myself that I was remembering this right. We have two phases being brought down ou; /archives//html/TenTec/2009-04/msg00035.html (18,303 bytes)
15. 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)
16. 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)
17. Re: [TenTec] Corsair II buzz (score: 1): Author: "Gary Smith" <Gary@doctorgary.net>; Date: Thu, 02 Apr 2009 23:21:35 -0400; Hi again, While truly the idea of three phase noise generation and equipment is reading which I enjoy following, I gotta reiterate that I most recently heard this when running off a deep cycle batter; /archives//html/TenTec/2009-04/msg00038.html (17,716 bytes)
18. Re: [TenTec] Corsair II buzz (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Thu, 2 Apr 2009 23:40:07 -0400; Your point is well made and I apologize for going so far off-topic. I also have a Corsair II (In fact I have 3 of them, doing various tasks, one of which is serving as an IF strip for my SETI dish re; /archives//html/TenTec/2009-04/msg00039.html (20,632 bytes)
19. Re: [TenTec] Corsair II buzz (score: 1): Author: Ed - K9EW <k9ew57@gmail.com>; Date: Fri, 3 Apr 2009 08:06:42 -0500; Hi Gary, Have you confirmed that the source of the problem is from the particular AC power line hookup you have? I've been reading the Power Line thread with interest, but don't recall a direct confi; /archives//html/TenTec/2009-04/msg00040.html (9,925 bytes)
20. 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)

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