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1. [RFI] Broadband RFI... (score: 1): Author: Dave Cole <dave@nk7z.net>; Date: Tue, 31 May 2016 06:10:04 -0700; Hi, At some point in the last few weeks, someone mentioned something along the lines of a broadband RFI generator type of switching supply, of a type that sprays a huge swath of spectrum with what ap; /archives//html/RFI/2016-05/msg00081.html (9,013 bytes)
2. Re: [RFI] Broadband RFI... (score: 1): Author: David Robbins <k1ttt@verizon.net>; Date: Tue, 31 May 2016 08:33:58 -0500 (CDT); the only difference in hunting a broadband noise is that you have to be sure that when you go from your shack to mobile that you are hearing the same noise and aren't being distracted by a different; /archives//html/RFI/2016-05/msg00082.html (10,194 bytes)
3. Re: [RFI] Broadband RFI... (score: 1): Author: "Frank N. Haas KB4T" <utility.rfi.pro@gmail.com>; Date: Tue, 31 May 2016 09:54:08 -0400; A few years back I investigated a broadband source that was noticeable from 1 to about 10 MHz. It turned out to be a privately owned device...the actual type of device won't be mentioned because what; /archives//html/RFI/2016-05/msg00083.html (7,895 bytes)
4. Re: [RFI] Broadband RFI... (score: 1): Author: Dave Cole <dave@nk7z.net>; Date: Tue, 31 May 2016 07:26:03 -0700; Thank you for the quick comeback on this! Regarding DFing it, you tagged my main fear/issue-- being broadband RFI, with no signature, will it very difficult to correlate it on the mobile rig... I; /archives//html/RFI/2016-05/msg00084.html (8,954 bytes)
5. Re: [RFI] Broadband RFI... (score: 1): Author: Dave Cole <dave@nk7z.net>; Date: Tue, 31 May 2016 08:10:48 -0700; Frank, Thank you for the suggestions here, and you have described the RFI exactly! It looks like an elevated noise floor, by about 12 db. I also think I hear a single tone in there, that seems to; /archives//html/RFI/2016-05/msg00085.html (11,153 bytes)
6. Re: [RFI] Broadband RFI... (score: 1): Author: "David Robbins" <k1ttt@arrl.net>; Date: Tue, 31 May 2016 16:34:03 +0000; The output of any switching supply like that goes down in power as it goes up in frequency... that may be offset by the wires attached to it becoming more efficient antennas so it can be hard to pred; /archives//html/RFI/2016-05/msg00086.html (10,530 bytes)
7. Re: [RFI] Broadband RFI... (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Tue, 31 May 2016 10:53:35 -0700; Here's an applications note I wrote for NCJ. Part One ran in the last issue, Part Two runs in the next. k9yc.com/KillingReceiveNoise.pdf Comments appreciated -- additions, critical, etc. Dave, I STRO; /archives//html/RFI/2016-05/msg00087.html (8,393 bytes)
8. Re: [RFI] Broadband RFI... (score: 1): Author: Dave Cole <dave@nk7z.net>; Date: Tue, 31 May 2016 14:49:53 -0700; That little tidbit might make it a lot simpler to locate if this is one of those, thank you! I have been seeing a very wide band of noise rotate around now and then, and I suspect it might have been; /archives//html/RFI/2016-05/msg00088.html (9,974 bytes)
9. Re: [RFI] Broadband RFI... (score: 1): Author: Dave Cole <dave@nk7z.net>; Date: Tue, 31 May 2016 16:33:48 -0700; Hi Jim, I swear you have a paper on just about every subject of interest. I am doing a bit of RF snooping already, using the P3 fed from the K3, which shows me plus and minus 100 KHz, not much but; /archives//html/RFI/2016-05/msg00089.html (9,890 bytes)
10. Re: [RFI] Broadband RFI... (score: 1): Author: "KD7JYK DM09" <kd7jyk@earthlink.net>; Date: Tue, 31 May 2016 21:45:32 -0700; Anyone using these somewhat new broadband USB dongles in their searching? Results? Kurt _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.co; /archives//html/RFI/2016-06/msg00000.html (6,022 bytes)
11. Re: [RFI] Broadband RFI... (score: 1): Author: Dave Cole <dave@nk7z.net>; Date: Tue, 31 May 2016 22:41:42 -0700; Hi Kurt, I have one that I am building an upconverter for... I will post when finished. -- 73's, and thanks, Dave (NK7Z) For software/hardware reviews see: http://www.nk7z.net ______________________; /archives//html/RFI/2016-06/msg00001.html (7,882 bytes)
12. Re: [RFI] Broadband RFI... (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Tue, 31 May 2016 22:47:49 -0700; RFI/ EMC is a topic I started working on professionally around 2001. I'm still vice-chair of the AES Standards Committee Working Group on EMC, and am a principal author of all of our Standards on EMC; /archives//html/RFI/2016-06/msg00002.html (9,262 bytes)
13. Re: [RFI] Broadband RFI... (score: 1): Author: Dave Cole <dave@nk7z.net>; Date: Tue, 31 May 2016 23:08:02 -0700; Just finished my last "with RFI" S Meter blanket drive around and I now have a working theory of what is causing my RFI, and where it located. I have posted the maps, with S Meter reading to the web; /archives//html/RFI/2016-06/msg00003.html (8,638 bytes)
14. Re: [RFI] Broadband RFI... (score: 1): Author: Dave Cole <dave@nk7z.net>; Date: Tue, 31 May 2016 23:31:45 -0700; That answers some questions... :) Unfortunately, I don't believe I have anything to calibrate with, with the possible exception of an XG-3. I will look over the calibration process, and see if the; /archives//html/RFI/2016-06/msg00004.html (11,006 bytes)
15. Re: [RFI] Broadband RFI... (score: 1): Author: Tom Thompson <w0ivj@tomthompson.com>; Date: Wed, 1 Jun 2016 01:01:22 -0600; Hi Kurt, I am using an SDRPlay ($150 from HRO) with a high impedance, broadband preamp connected to a 3 ft. whip. See: https://www.youtube.com/watch?v=HIGMmEgzhv0&feature=youtu.be Tom W0IVJ Anyone us; /archives//html/RFI/2016-06/msg00005.html (8,492 bytes)
16. Re: [RFI] Broadband RFI... (score: 1): Author: Tom Thompson <w0ivj@tomthompson.com>; Date: Wed, 1 Jun 2016 01:29:54 -0600; Hi Kurt, I am using an SDRPlay ($150 from HRO) with a high impedance, broadband preamp connected to a 3 ft. whip. See: https://www.youtube.com/watch?v=HIGMmEgzhv0&feature=youtu.be Tom W0IVJ Anyone us; /archives//html/RFI/2016-06/msg00006.html (8,297 bytes)
17. Re: [RFI] Broadband RFI... (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Wed, 1 Jun 2016 12:18:31 -0700; On Tue,5/31/2016 11:31 PM, Dave Cole wrote: Two things I do-- I take my second display for the P3, which is a 7 inch LCD, and adjust the brightness to show off the most low level detail possible in t; /archives//html/RFI/2016-06/msg00007.html (9,646 bytes)
18. Re: [RFI] Broadband RFI... (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Wed, 1 Jun 2016 12:23:49 -0700; That looks interesting. I bought an ANAN 10E for that application, and have played with it enough to know that I like it, but not yet seriously. It's currently on loan to a colleague. Jim K9YC I am u; /archives//html/RFI/2016-06/msg00008.html (8,555 bytes)
19. Re: [RFI] Broadband RFI... (score: 1): Author: Dave Cole <dave@nk7z.net>; Date: Wed, 01 Jun 2016 12:58:33 -0700; Hi collective group, Thanks to all that helped in this... I had no idea that there was a broadband RFI generator around, and now that I know it, I have a new device to dislike. Too bad the FCC does; /archives//html/RFI/2016-06/msg00009.html (8,656 bytes)
20. Re: [RFI] Broadband RFI... (score: 1): Author: Dave Cole <dave@nk7z.net>; Date: Wed, 01 Jun 2016 12:56:58 -0700; You are most welcome Jim, I would be interested in your thoughts on BW mode as it relates to bringing things out of the mud in the display. I was floored what color was hiding the first time I put t; /archives//html/RFI/2016-06/msg00010.html (9,871 bytes)

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