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References: [ +from:n7rjn@nobis.net: 18 ]

Total 18 documents matching your query.

1. Re: [RFI] HF Handy Talkie for RFI Detection? (score: 1)
Author: Robert Nobis <n7rjn@nobis.net>
Date: Fri, 5 Feb 2016 20:36:58 -0700
Tony, I have used my Elecraft KX3 to do such searches on the HF bands. The KX3 may be operated with internal batteries. 73, Bob Nobis - N7RJN n7rjn@nobis.net _________________________________________
/archives//html/RFI/2016-02/msg00036.html (8,057 bytes)

2. Re: [RFI] Plasma TV Spectrum Plots? (score: 1)
Author: Robert Nobis <n7rjn@nobis.net>
Date: Sun, 6 Mar 2016 15:07:10 -0700
Jim, I am looking forward to your new tutorial. I have found that Identifying different types of noise sources is rather difficult. Unfortunately, I do not have an example of noise from a Plasma TV.
/archives//html/RFI/2016-03/msg00003.html (7,590 bytes)

3. Re: [RFI] House Ground (score: 1)
Author: Robert Nobis <n7rjn@nobis.net>
Date: Tue, 15 Mar 2016 23:24:55 -0700
Jim, Many modern, small profile, PCs have a built in power supply (switching) and are connected to the AC mains with a two wire cord/plug, without a green wire. My iMac and MacMini are like this as i
/archives//html/RFI/2016-03/msg00048.html (9,059 bytes)

4. Re: [RFI] House Ground (score: 1)
Author: Robert Nobis <n7rjn@nobis.net>
Date: Wed, 16 Mar 2016 09:55:44 -0700
Cortland, The MacMini is the also double insulated, although it has an internal power supply. More and more computer manufacturers are doing this. However, it is not totally clear to me how one could
/archives//html/RFI/2016-03/msg00053.html (9,725 bytes)

5. Re: [RFI] RFI via Florescent Lights (score: 1)
Author: Robert Nobis <n7rjn@nobis.net>
Date: Mon, 4 Apr 2016 19:44:11 -0700
Mike, If these were in my garage, I would replace them. Using ferrite chokes might help, but is really a band-aid approach. 73, Bob Nobis - N7RJN n7rjn@nobis.net _____________________________________
/archives//html/RFI/2016-04/msg00005.html (8,416 bytes)

6. Re: [RFI] JIM BROWN K9YC (score: 1)
Author: Robert Nobis <n7rjn@nobis.net>
Date: Wed, 4 May 2016 08:00:15 -0700
Congratulations and thank you, Jim. 73, Bob Nobis - N7RJN n7rjn@nobis.net _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listi
/archives//html/RFI/2016-05/msg00013.html (8,697 bytes)

7. Re: [RFI] How very interesting... (score: 1)
Author: Robert Nobis <n7rjn@nobis.net>
Date: Thu, 25 Aug 2016 07:26:05 -0700
Hi Dave, I have been considering getting an SDRPlay or equivalent for some time now. This plot convinced me it would be a good tool for hunting QRM & QRN. Thanks and 73, Bob Nobis - N7RJN n7rjn@nobis
/archives//html/RFI/2016-08/msg00138.html (9,128 bytes)

8. Re: [RFI] How very interesting... (score: 1)
Author: Robert Nobis <n7rjn@nobis.net>
Date: Thu, 25 Aug 2016 08:11:31 -0700
Thanks, Dave, Bob Nobis - N7RJN n7rjn@nobis.net _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi
/archives//html/RFI/2016-08/msg00141.html (9,716 bytes)

9. [RFI] Reducing ham shack RFI (score: 1)
Author: Robert Nobis <n7rjn@nobis.net>
Date: Fri, 26 Aug 2016 16:11:59 -0700
I operate primarily using the weak signal WSJT-X modes. In an effort to reduce RFI, I am in the process of getting rid of or converting all equipment in my ham shack that has switching power supplies
/archives//html/RFI/2016-08/msg00163.html (6,663 bytes)

10. Re: [RFI] computer screen rfi (score: 1)
Author: Robert Nobis <n7rjn@nobis.net>
Date: Fri, 23 Dec 2016 08:01:13 -0700
Kostas, Do you have a screen shot showing the noise you see? 73, Bob Nobis n7rjn@nobis.net _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.
/archives//html/RFI/2016-12/msg00068.html (8,816 bytes)

11. Re: [RFI] RF (score: 1)
Author: Robert Nobis <n7rjn@nobis.net>
Date: Fri, 23 Dec 2016 14:41:55 -0700
Bill, I had a similar problem with an electronically operated doggy door. What I found was that I had relatively high common mode current on my antenna feed so the feed was also radiating. My antenna
/archives//html/RFI/2016-12/msg00075.html (8,827 bytes)

12. Re: [RFI] RF (score: 1)
Author: Robert Nobis <n7rjn@nobis.net>
Date: Fri, 23 Dec 2016 16:36:24 -0700
Jim, In may case, I had an outdoor antenna, however the feed line was fairly close the electronically activated doggy door. Using your common mod choke on the feed line near the connection to the ant
/archives//html/RFI/2016-12/msg00079.html (11,938 bytes)

13. Re: [RFI] RF (score: 1)
Author: Robert Nobis <n7rjn@nobis.net>
Date: Fri, 23 Dec 2016 21:41:21 -0700
Jim, Yes, thank you. Whenever I have an RFI issue I go to your various tutorials. 73, Bob Nobis n7rjn@nobis.net _______________________________________________ RFI mailing list RFI@contesting.com htt
/archives//html/RFI/2016-12/msg00081.html (8,790 bytes)

14. Re: [RFI] Re-wiring station (score: 1)
Author: Robert Nobis <n7rjn@nobis.net>
Date: Fri, 30 Dec 2016 15:01:21 -0700
Hi Chuck, Using twisted pairs is always a good idea. You might wish to review the tutorial written by Jim Brown (K9YC). http://k9yc.com/RFI-Ham.pdf 73, Bob Nobis n7rjn@nobis.net _____________________
/archives//html/RFI/2016-12/msg00100.html (9,546 bytes)

15. Re: [RFI] Re-wiring station (score: 1)
Author: Robert Nobis <n7rjn@nobis.net>
Date: Fri, 30 Dec 2016 19:33:15 -0700
Chuck, I have never seen anything on number of turns. I simply wind as many as I can get in a given length of zip cord. 73, Bob Nobis n7rjn@nobis.net _______________________________________________ R
/archives//html/RFI/2016-12/msg00103.html (11,493 bytes)

16. Re: [RFI] Re-wiring station (score: 1)
Author: Robert Nobis <n7rjn@nobis.net>
Date: Fri, 30 Dec 2016 21:50:51 -0700
Ken, As I recall, the CAT5 or CAT6 specifications do not actually specify that each pair have a different number of twists per inch. They do specify that all pairs be less than 38mm per twist and tha
/archives//html/RFI/2016-12/msg00105.html (10,182 bytes)

17. Re: [RFI] USB qrm - what to do? (score: 1)
Author: Robert Nobis <n7rjn@nobis.net>
Date: Mon, 13 Mar 2017 07:48:04 -0700
Pete, Besides using quality shielded USB cables, make sure that your computer is also separately grounded to your common station ground with a one inch ground strap. In other words dont rely on the g
/archives//html/RFI/2017-03/msg00026.html (9,047 bytes)

18. Re: [RFI] FCC issues a Notice of Violation to Solar City for RFI Inteferance (score: 1)
Author: Robert Nobis <n7rjn@nobis.net>
Date: Fri, 17 Mar 2017 11:04:46 -0700
Hi Mike, Thank you. When we first moved to our neighborhood eight years ago there were only nine other houses in this new subdivision. None of us had solar power then. Since then, about seventy other
/archives//html/RFI/2017-03/msg00042.html (10,683 bytes)

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