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1. [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)
2. Re: [TenTec] RF Ground (score: 1): Author: Martin Ewing <martin.s.ewing@gmail.com>; Date: Sat, 4 Apr 2009 11:52:15 -0400; Yes, but... It's still worth trying to establish a local RF "ground" -- ensuring that everything in your shack is bonded together. No antenna system is perfect, and many of us have some RF in our sha; /archives//html/TenTec/2009-04/msg00055.html (11,429 bytes)
3. 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)
4. Re: [TenTec] RF Ground (score: 1): Author: Steve Hunt <steve@karinya.net>; Date: Sat, 04 Apr 2009 21:13:39 +0100; Have you ever considered that providing a better local RF "ground" could make "RF in the shack" problems worse? Take the example of a half-wave dipole fed with coax that is a multiple of a half-wavel; /archives//html/TenTec/2009-04/msg00061.html (9,134 bytes)
5. Re: [TenTec] RF Ground (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Sat, 4 Apr 2009 18:13:03 -0400; I don't feel that this is a particularly good example for the following reason. If, and only if, the ground point at the radio where the coax is terminated to the radio is an excellent RF ground, the; /archives//html/TenTec/2009-04/msg00064.html (11,201 bytes)
6. Re: [TenTec] RF Ground (score: 1): Author: Martin Ewing <martin.s.ewing@gmail.com>; Date: Sat, 4 Apr 2009 19:28:38 -0400; If you're in a Faraday Cage, you are not sensitive to currents flowing on the outside, which is where any unbalanced antenna currents should go - assuming no "pin 1" issues. It doesn't help the anten; /archives//html/TenTec/2009-04/msg00066.html (10,441 bytes)
7. Re: [TenTec] RF Ground (score: 1): Author: "Bob McGraw - K4TAX" <RMcGraw@Blomand.net>; Date: Sat, 4 Apr 2009 20:17:24 -0500; Several points: (a) I did not mention any connection to earth for ground, and;. (b) I did discuss in detail bonding or grounding related to power for the station. (c) I did mention that ground wires; /archives//html/TenTec/2009-04/msg00067.html (11,755 bytes)
8. Re: [TenTec] RF Ground (score: 1): Author: "Bob McGraw - K4TAX" <RMcGraw@Blomand.net>; Date: Sat, 4 Apr 2009 20:29:25 -0500; Your station should operate successfully with only the equipment bonded to the power supply and that attached to an outlet with a solid 3rd pin ground. If it doesn't then you have antenna and feedlin; /archives//html/TenTec/2009-04/msg00068.html (13,507 bytes)
9. Re: [TenTec] RF Ground (score: 1): Author: "Bob McGraw - K4TAX" <RMcGraw@Blomand.net>; Date: Sat, 4 Apr 2009 20:49:01 -0500; Why would one feed a dipole, generally considered a balanced antenna, with an unbalanced coax? Should you do so, then you do need a RF choke at the feed point to reduce current on the outside of the; /archives//html/TenTec/2009-04/msg00069.html (12,809 bytes)
10. Re: [TenTec] RF Ground (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Sat, 4 Apr 2009 22:58:24 -0400; One should not. I would not. I don't. But lots of people do. Its a valid point for consideration only because it is so common. Now WHY it is so common is a whole other point. But I'm not going to go; /archives//html/TenTec/2009-04/msg00070.html (14,695 bytes)
11. Re: [TenTec] RF Ground (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Sat, 4 Apr 2009 23:02:44 -0400; Would you agree that the earth is considered a zero potential reference point when compared to things located on or flying above it ? Would you agree that is true for both DC and AC ? Would you agree; /archives//html/TenTec/2009-04/msg00071.html (11,759 bytes)
12. Re: [TenTec] RF Ground (score: 1): Author: "Bob McGraw - K4TAX" <RMcGraw@Blomand.net>; Date: Sat, 4 Apr 2009 22:22:22 -0500; I agree! Oh, I guess it's always been done that way and somewhat or kinda works, most of the time. And because the ARRL Handbook shows it this way. Bob _______________________________________________; /archives//html/TenTec/2009-04/msg00072.html (16,077 bytes)
13. Re: [TenTec] RF Ground (score: 1): Author: shristov <shristov@ptt.rs>; Date: Sun, 05 Apr 2009 05:29:44 +0200; An arbitrary point can be taken as a potential reference. The choice itself has no physical consequences. It's just a notational convenience. 73, Sinisa YT1NT, VE3EA ________________________________; /archives//html/TenTec/2009-04/msg00073.html (8,434 bytes)
14. Re: [TenTec] RF Ground (score: 1): Author: "Gary Hoffman" <ghoffman@spacetech.com>; Date: Sun, 5 Apr 2009 00:30:36 -0400; That's true, one can always take an arbitrary point as a reference. That, however, is not the question I asked. -- _______________________________________________ TenTec mailing list TenTec@contestin; /archives//html/TenTec/2009-04/msg00075.html (9,696 bytes)
15. 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)
16. 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)
17. 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)
18. 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)
19. Re: [TenTec] RF Ground (score: 1): Author: Jim WA9YSD <wa9ysd@yahoo.com>; Date: Sun, 5 Apr 2009 05:10:59 -0700 (PDT); You may want to start off with a shielded ground, and then put common mode chokes at all the orifices on the radio equipment. Then determine what is causing your issue. Keep The Faith, Jim K9TF/WA9YS; /archives//html/TenTec/2009-04/msg00082.html (6,735 bytes)
20. Re: [TenTec] RF Ground (score: 1): Author: shristov <shristov@ptt.rs>; Date: Sun, 05 Apr 2009 14:30:33 +0200; Exactly what I was trying to say... ...if there is such a thing as nature's reference point, which I doubt. 73, Sinisa YT1NT, VE3EA _______________________________________________ TenTec mailing list; /archives//html/TenTec/2009-04/msg00083.html (8,709 bytes)

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