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Total 17 documents matching your query.

1. [TenTec] RF gets into computer (score: 1): Author: "John K Gotwals" <john@gotwals.com>; Date: Thu, 26 Oct 2006 09:56:03 -0400; When I operate on 75 meter SSB with my Orion, my computer beeps and disconnects/reconnects my USB connected keyboard. Note that I do not have this problem on 40 meter SSB. My computer is located on t; /archives//html/TenTec/2006-10/msg00613.html (7,005 bytes)
2. Re: [TenTec] RF gets into computer (score: 1): Author: "John T. Fleming" <W3GQJ@earthlink.net>; Date: Thu, 26 Oct 2006 10:23:45 -0400; John, I used to have trouble with a CO detector going off then I was on 20 meters. The resolution was to route the A/C power lead differently. Try a keyboard that plugs into the keyboard socket inste; /archives//html/TenTec/2006-10/msg00614.html (8,440 bytes)
3. Re: [TenTec] RF gets into computer (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Thu, 26 Oct 2006 09:02:20 -0600; Look at Mouser (www.mouser.com) for Fair-Rite EMI suppression Ferrite Cores. Perhaps something like a split core in Material 31, 623-0431164181. It will fit over a half inch diameter cable for $4. Wh; /archives//html/TenTec/2006-10/msg00615.html (8,382 bytes)
4. Re: [TenTec] RF gets into computer (score: 1): Author: "Ron Castro" <ronc@sonic.net>; Date: Thu, 26 Oct 2006 09:07:47 -0700; I have also found that some keyboards are more susceptible to RF than others. I don't know why, but there are definitely differences. http://www.yccc.org/Articles/W1HIS/CommonModeChokesW1HIS2006Apr06; /archives//html/TenTec/2006-10/msg00616.html (10,588 bytes)
5. [TenTec] RF gets into computer (score: 1): Author: "John K Gotwals" <john@gotwals.com>; Date: Thu, 26 Oct 2006 19:33:33 -0400; Many thanks for the link to W1HIS' excellent document. John, N9JG -- Original Message -- Date: Thu, 26 Oct 2006 09:07:47 -0700 From: "Ron Castro" <ronc@sonic.net> Subject: Re: [TenTec] RF gets into c; /archives//html/TenTec/2006-10/msg00630.html (8,514 bytes)
6. [TenTec] RF gets into computer (score: 1): Author: "John K Gotwals" <john@gotwals.com>; Date: Fri, 27 Oct 2006 10:35:48 -0400; The following two steps seem to have solved the problem I had on 75 meters, at least when running the Orion barefoot. 1) Ran #12 wire through the 2nd-story window sill and down to a 10 feet long copp; /archives//html/TenTec/2006-10/msg00642.html (8,346 bytes)
7. Re: [TenTec] RF gets into computer (score: 1): Author: jsb@digistar.com; Date: Fri, 27 Oct 2006 15:59:47 -0400 (EDT); I had a lot of trouble with RF getting in through the Ethernet port. I put a couple big (not the little ones) snap-on ferrites with 2 turns through each and the problem disappeared. hope this helps.; /archives//html/TenTec/2006-10/msg00649.html (8,054 bytes)
8. Re: [TenTec] RF gets into computer (score: 1): Author: "John B. Egger" <john_egger@comcast.net>; Date: Sun, 22 Apr 2007 16:22:28 +0000; Old thread, but something is exacerbating my problem recently. On 40m CW the Orion II at full power is now QRM'ing my computer; I had to copy some traffic by pen and paper this morning because of it.; /archives//html/TenTec/2007-04/msg00389.html (9,015 bytes)
9. Re: [TenTec] RF gets into computer (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Sun, 22 Apr 2007 10:33:19 -0600; Seeing the problem cured with the dummy load points to the antenna. You need to either reduce power or move the antenna. You are getting plenty of RF exposure that close to the antenna as the compute; /archives//html/TenTec/2007-04/msg00390.html (9,237 bytes)
10. Re: [TenTec] RF gets into computer (score: 1): Author: Martin AA6E <aa6e@ewing.homedns.org>; Date: Sun, 22 Apr 2007 13:10:39 -0400; Not so much the antenna, though that could be the source if it is close by, but more likely the feed line. Is your antenna properly balanced so that there is no current flowing on the outside of the; /archives//html/TenTec/2007-04/msg00392.html (11,036 bytes)
11. Re: [TenTec] RF gets into computer (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Sun, 22 Apr 2007 11:39:02 -0600; Antenna at 15' I call close. If the feed line is radiating that makes it worse and even with a balun at the antenna, if the feed line isn't at right angles to the antenna RF will be coupled to the ou; /archives//html/TenTec/2007-04/msg00394.html (11,981 bytes)
12. Re: [TenTec] RF gets into computer (score: 1): Author: K4IA@aol.com; Date: Sun, 22 Apr 2007 13:46:21 EDT; Have you tried grounding your computer case to the station ground? k4ia Craig "Buck" Fredericksburg, Virginia USA ** See what's free at http://www.aol.com. ___________________________________________; /archives//html/TenTec/2007-04/msg00398.html (7,418 bytes)
13. [TenTec] RF gets into computer (score: 1): Author: "John K Gotwals" <john@gotwals.com>; Date: Mon, 23 Apr 2007 13:18:54 -0400; RF wise, my situation is not very desirable: My shack is on the second floor, one end of a 110 feet dipole fed with open-wire line is 15 feet from my computer, the feedline droops some but does paral; /archives//html/TenTec/2007-04/msg00408.html (10,578 bytes)
14. Re: [TenTec] RF gets into computer (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Mon, 23 Apr 2007 13:09:13 -0600; For RF filtering, ferrite with a much higher permeability (and loss at HF) is preferred to what one would use for a transformer core at the same frequency. Essentially the higher the permeability the; /archives//html/TenTec/2007-04/msg00410.html (10,844 bytes)
15. Re: [TenTec] RF gets into computer (score: 1): Author: "Ron Castro" <ronc@sonic.net>; Date: Mon, 23 Apr 2007 12:53:14 -0700; Generally, Mix 43 and Mix 77 are the best for attenuation in the HF and low VHF frequencies. For more information, check the Amidon site at: http://www.amidoncorp.com/aai_ferritecores.htm Although th; /archives//html/TenTec/2007-04/msg00411.html (9,005 bytes)
16. Re: [TenTec] RF gets into computer (score: 1): Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>; Date: Sun, 22 Apr 2007 18:52:08 -0700; The link below is to my tutorial on RFI to and from our ham stations. It addresses exactly the problems you are having. http://audiosystemsgroup.com/RFI-Ham.pdf The most likely cause of this kind of; /archives//html/TenTec/2007-04/msg00412.html (8,507 bytes)
17. Re: [TenTec] RF gets into computer (score: 1): Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>; Date: Sun, 22 Apr 2007 21:49:53 -0700; At my old QTH in Chicago, I had very limited space for antennas. On 160 and 80 meters, I used a long wire that ended in the shack and ran within 18 inches of the serial cable connecting the computer; /archives//html/TenTec/2007-04/msg00413.html (9,458 bytes)

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