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1. [RFI] MFJ-856 oddity (score: 1): Author: N1BUG <paul@n1bug.com>; Date: Mon, 06 Aug 2012 07:06:45 -0400; I'm still pursuing my power line noise. I have a few questions, starting with this one: A while ago I modified an MFJ-856 power line noise sniffer. The mods consisted of adding a T match to the drive; /archives//html/RFI/2012-08/msg00025.html (7,200 bytes)
2. Re: [RFI] MFJ-856 oddity (score: 1): Author: Dave Cole <dave@nk7z.net>; Date: Mon, 06 Aug 2012 06:12:29 -0700; Hi again Paul, Unplug anything from the the headphone jack and try that test... :) -- Thanks, Dave http://www.nk7z.net for equipment reviews, propagation, and more... For JT65 Discussions: https://gr; /archives//html/RFI/2012-08/msg00026.html (8,904 bytes)
3. Re: [RFI] MFJ-856 oddity (score: 1): Author: Tom Thompson <tlthompson@qwest.net>; Date: Mon, 06 Aug 2012 07:19:57 -0600; Paul, You might try a common mode choke on the coax. Tom W0IVJ _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi; /archives//html/RFI/2012-08/msg00027.html (8,178 bytes)
4. Re: [RFI] MFJ-856 oddity (score: 1): Author: "RFI Services' Michael Martin" <mike@rfiservices.com>; Date: Tue, 7 Aug 2012 08:07:45 -0400; I have an 856 and have not experienced this issue. Never stand under the power line with the receiver. The antenna for the noise will be over the antenna for the receiver and the yagi will be like a; /archives//html/RFI/2012-08/msg00028.html (10,342 bytes)
5. Re: [RFI] MFJ-856 oddity (score: 1): Author: Sam Morgan <k5oai.sam@gmail.com>; Date: Tue, 07 Aug 2012 08:35:35 -0500; http://www.telonics.com/products/vhfAntennas/RA-NS_index.php http://www.telonics.com/products/vhfAntennas/RA-NS-RA-2A.php -- GB & 73 K5OAI Sam Morgan _______________________________________________ R; /archives//html/RFI/2012-08/msg00029.html (11,413 bytes)
6. Re: [RFI] MFJ-856 oddity (score: 1): Author: N1BUG <paul@n1bug.com>; Date: Tue, 07 Aug 2012 15:41:50 -0400; Hi Dave, I know you were joking, but actually I could try that and see if the S meter reading changes. It might give some clue... 73, Paul _______________________________________________ RFI mailing; /archives//html/RFI/2012-08/msg00030.html (7,462 bytes)
7. Re: [RFI] MFJ-856 oddity (score: 1): Author: N1BUG <paul@n1bug.com>; Date: Tue, 07 Aug 2012 15:52:12 -0400; Thanks Tom, I've been thinking about that. I'm trying to figure out what is the best common mode choke I can do without starting all over on the mods. I have about 7.5 inches of RG-142B/U coax expose; /archives//html/RFI/2012-08/msg00031.html (7,528 bytes)
8. Re: [RFI] MFJ-856 oddity (score: 1): Author: N1BUG <paul@n1bug.com>; Date: Tue, 07 Aug 2012 16:24:31 -0400; Thanks Michael, I appreciate your comments. This situation with the attenuator having no affect in a few areas is something I want to understand because I hate things I don't understand! Most of the; /archives//html/RFI/2012-08/msg00032.html (10,404 bytes)
9. Re: [RFI] MFJ-856 oddity (score: 1): Author: Hisashi T Fujinaka <htodd@twofifty.com>; Date: Tue, 7 Aug 2012 22:30:45 -0700 (PDT); Cool. Thanks for all your efforts. I've only had mine out once and I narrowed down the area (which happened to be right in front of my house) and I'm on my way to building an ultrasonic receiver out; /archives//html/RFI/2012-08/msg00035.html (12,090 bytes)
10. Re: [RFI] MFJ-856 oddity (score: 1): Author: "EDWARDS, EDDIE J" <eedwards@oppd.com>; Date: Wed, 8 Aug 2012 14:27:20 +0000; Hisashi, I think one of our techs at work who is also a ham assembled an ultrasound kit with a dish. He found it really didn't work well enough to be much help doing RI tracking on electric power pol; /archives//html/RFI/2012-08/msg00037.html (14,036 bytes)
11. Re: [RFI] MFJ-856 oddity (score: 1): Author: Cortland Richmond <ka5s@earthlink.net>; Date: Wed, 08 Aug 2012 11:53:13 -0400; It was almost 30 years ago that I found an annoying 2-meter noise source on a pole adjacent to the control tower at our local airport. it was necessary to go up to 440 MHz (AM mode) and I've since us; /archives//html/RFI/2012-08/msg00038.html (8,896 bytes)
12. Re: [RFI] MFJ-856 oddity (score: 1): Author: Missouri Guy <n0tt1@juno.com>; Date: Wed, 15 Aug 2012 02:15:05 +0000; Paul, I haven't experienced the same problem as yours. I use a homebrew Moxon antenna for my RFI chasing. I put several #43 beads on the coax right at the antenna driven element and at the receiver.; /archives//html/RFI/2012-08/msg00076.html (10,006 bytes)
13. Re: [RFI] MFJ-856 oddity (score: 1): Author: N1BUG <paul@n1bug.com>; Date: Wed, 15 Aug 2012 09:51:17 -0400; Charlie, My total attenuation (series connected) is 50 dB. There are places even that is not enough - where the meter will sit pegged throughout a ~400 foot area. These are *not* areas where the atte; /archives//html/RFI/2012-08/msg00077.html (11,099 bytes)
14. Re: [RFI] MFJ-856 oddity (score: 1): Author: Cortland Richmond <ka5s@earthlink.net>; Date: Wed, 15 Aug 2012 16:13:50 -0400; That has to be SOME noise! Assuming no saturation, how about a sensitivity adjustment/step for the meter? Cortland KA5S _______________________________________________ RFI mailing list RFI@contesting; /archives//html/RFI/2012-08/msg00078.html (8,890 bytes)
15. Re: [RFI] MFJ-856 oddity (score: 1): Author: "KD7JYK DM09" <kd7jyk@earthlink.net>; Date: Wed, 15 Aug 2012 19:52:42 -0700; For comparison. I use a 24" whip, not a Yagi in my RFI sniffing. I use up to 131dB of attenuation. Kurt _______________________________________________ RFI mailing list RFI@contesting.com http://lis; /archives//html/RFI/2012-08/msg00081.html (8,011 bytes)

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