- 1. [RFI] Ethernet RFI (score: 1)
- Author: "Alan NV8A (ex. AB2OS)" <nv8a@att.net>
- Date: Sat, 22 Jan 2005 20:05:27 -0500
- My wife's computer is located about 20' below and almost immediately under the fed end (via an Icom AH-4 autotuner) of my wire antenna. The computer is connected via CAT5e cable to a Linksys 8-port s
- /archives//html/RFI/2005-01/msg00046.html (7,412 bytes)
- 2. Re: [RFI] Ethernet RFI (score: 1)
- Author: "Jim Brown" <jim@audiosystemsgroup.com>
- Date: Sat, 22 Jan 2005 19:31:15 -0600
- See this link to a new applications note on my website about how to use ferrite chokes to kill stuff like this. This one is geared toward keeping RF out of audio, but the physics is exactly the same.
- /archives//html/RFI/2005-01/msg00047.html (9,335 bytes)
- 3. Re: [RFI] Ethernet RFI (score: 1)
- Author: "Ford Peterson" <ford@cmgate.com>
- Date: Sat, 22 Jan 2005 19:41:37 -0600
- ...SNIP... Alan, One of my pet peeves is when computer technicians wire cat5 cables incorrectly. There is a right way and a wrong way to do it. The right way is the most difficult. Guess which way mo
- /archives//html/RFI/2005-01/msg00048.html (8,456 bytes)
- 4. Re: [RFI] Ethernet RFI (score: 1)
- Author: W0UN -- John Brosnahan <shr@swtexas.net>
- Date: Sat, 22 Jan 2005 20:00:26 -0600
- Here are a couple of good sites for wiring CAT5 connectors. http://www.netspec.com/helpdesk/wiredoc.html http://www.netadmintools.com/art146.html 73 John W0UN ________________________________________
- /archives//html/RFI/2005-01/msg00049.html (7,183 bytes)
- 5. Re: [RFI] Ethernet RFI (score: 1)
- Author: "Alan NV8A (ex. AB2OS)" <nv8a@att.net>
- Date: Sat, 22 Jan 2005 21:03:32 -0500
- Wireless networking is fast enough for surfing the Web, etc. (the security aspect is something else), but it would be a bottleneck for backing up remote machines to the tape drive in mine and for oth
- /archives//html/RFI/2005-01/msg00050.html (7,748 bytes)
- 6. RE: [RFI] Ethernet RFI (score: 1)
- Author: "Brian Goldsmith" <brian.goldsmith@echo1.com.au>
- Date: Sun, 23 Jan 2005 13:25:10 +1100
- Alan, One of my pet peeves is when computer technicians wire cat5 cables incorrectly The 8 conductors in that cable are actually 4 pairs of twisted cables. Each pair is a "hot" and a ground return. *
- /archives//html/RFI/2005-01/msg00051.html (7,629 bytes)
- 7. Re: [RFI] Ethernet RFI (score: 1)
- Author: "Ford Peterson" <ford@cmgate.com>
- Date: Sat, 22 Jan 2005 21:28:10 -0600
- I respect your correction. But my point is absolutely true. Each "pair" is designed to work as a pair. Wiring the cables in ANY configuration that retains the pairs the way they are designed will re
- /archives//html/RFI/2005-01/msg00052.html (8,786 bytes)
- 8. Re: [RFI] Ethernet RFI (score: 1)
- Author: "Jim Brown" <jim@audiosystemsgroup.com>
- Date: Sat, 22 Jan 2005 21:40:59 -0600
- You'd better go for a paycheck loan, Ford. :) You (and the tutorial) are absolutely correct that a twisted pair helps TREMENDOUSLY in killing DIFFERENTIAL mode coupling to/from the cable. And we have
- /archives//html/RFI/2005-01/msg00053.html (8,268 bytes)
- 9. Re: [RFI] Ethernet RFI (score: 1)
- Author: "Ford Peterson" <ford@cmgate.com>
- Date: Sun, 23 Jan 2005 00:33:00 -0600
- Jim, My bet was a safe one. I haven't had a paycheck since 1988. I seriously doubt I will have one any time soon. But if I do, I'll look you up on QRZ and settle up... Many stations use Ethernet to
- /archives//html/RFI/2005-01/msg00054.html (9,287 bytes)
- 10. Re: [RFI] Ethernet RFI (score: 1)
- Author: "John Pelham" <john@radiophile.com>
- Date: Sun, 23 Jan 2005 11:44:47 -0500
- Ford wrote: When you hook up the cables to keep the colors all the same on each pin at each end, you will have conductivity between the correct pins, and the network will work, but you completely los
- /archives//html/RFI/2005-01/msg00058.html (11,727 bytes)
- 11. Re: [RFI] Ethernet RFI (score: 1)
- Author: "Ford Peterson" <ford@cmgate.com>
- Date: Sun, 23 Jan 2005 11:45:28 -0600
- John, This is difficult to explain in words. Pictures are much better. Here is a great tutorial on the connectors. And obviously the 'Jack' these cables plug into need to be appropriately wired as w
- /archives//html/RFI/2005-01/msg00060.html (8,848 bytes)
- 12. Re: [RFI] Ethernet RFI (score: 1)
- Author: "Ford Peterson" <ford@cmgate.com>
- Date: Sun, 23 Jan 2005 11:56:54 -0600
- Here is another great tutorial the describes all the various combinations of wiring sets. http://yoda.uvi.edu/InfoTech/rj45.htm I think this one is even clearer than the others posted previously. For
- /archives//html/RFI/2005-01/msg00061.html (7,954 bytes)
- 13. RE: [RFI] Ethernet RFI (score: 1)
- Author: Ed -K0iL <eedwards@tconl.com>
- Date: Sun, 23 Jan 2005 13:18:08 -0600
- Wouldn't there be 8 to the 8th-power possible combinations for 8 pin connections? (Someone may wish to check my math. There are 64 combinations if you just keep the wires in the same order just shift
- /archives//html/RFI/2005-01/msg00062.html (11,672 bytes)
- 14. Re: [RFI] Ethernet RFI (score: 1)
- Author: "Jim" <jvpoll@dallas.net>
- Date: Sun, 23 Jan 2005 14:32:25 -0600
- Using fomulas from the theory of 'Permutations and Combinations' the following equation determines the number of unique groupings (irrespective of the order or different permutations such as 1, 2 and
- /archives//html/RFI/2005-01/msg00063.html (13,482 bytes)
- 15. RE: [RFI] Ethernet RFI (score: 1)
- Author: "Jim Brown" <jim@audiosystemsgroup.com>
- Date: Sun, 23 Jan 2005 15:15:19 -0600
- Not only is correct wiring critical for EMC, it is also quite critical for performance as an Ethernet cable. Understand this basic concept. A CAT5 cable (or CATx, for that matter) consists of FOUR TW
- /archives//html/RFI/2005-01/msg00064.html (9,514 bytes)
- 16. RE: [RFI] Ethernet RFI (score: 1)
- Author: Ed -K0iL <eedwards@tconl.com>
- Date: Sun, 23 Jan 2005 18:59:23 -0600
- That's what I get for "shooting from the hip" and not looking it up (my EIT reference book is at work). I stand corrected. (that's why I skipped that section on the FE exam). And I saw my mistake in
- /archives//html/RFI/2005-01/msg00067.html (8,598 bytes)
- 17. Re: [RFI] Ethernet RFI (score: 1)
- Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>
- Date: Mon, 24 Jan 2005 09:55:52 +0000
- Jim Brown wrote: If your eyes were good enough and you had a good magnifying glass, you could, indeed, check for wiring errors. The assumption that the wiring is satisfactory is NOT. There are, for e
- /archives//html/RFI/2005-01/msg00069.html (9,329 bytes)
- 18. Re: [RFI] Ethernet RFI (score: 1)
- Author: Bill Coleman <aa4lr@arrl.net>
- Date: Sun, 30 Jan 2005 09:09:56 -0500
- On Jan 22, 2005, at 8:41 PM, Ford Peterson wrote: One of my pet peeves is when computer technicians wire cat5 cables incorrectly. There is a right way and a wrong way to do it. The right way is the m
- /archives//html/RFI/2005-01/msg00085.html (10,172 bytes)
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