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Total 20 documents matching your query.

1. [RFI] New RFI (score: 1): Author: RALPH GRANCHELLI <rgranchelli@esedona.net>; Date: Mon, 11 Jan 2021 21:45:23 -0700; Hello inteference investigators, I have new RFI issue that started about a week ago. I have eliminated the house / items as a source. Killed all breakers, ran the XCRV from batt. No change. Disconne; /archives//html/RFI/2021-01/msg00053.html (7,354 bytes)
2. Re: [RFI] New RFI (score: 1): Author: Dave Cole <dave@nk7z.net>; Date: Tue, 12 Jan 2021 05:25:26 -0800; Hello, I have some RFI location information at: https://www.nk7z.net/i-have-rfi-now-what-locating-it/ I use the MFJ-856, (https://mfjenterprises.com/products/mfj-856), when looking for VHF RFI. It wi; /archives//html/RFI/2021-01/msg00055.html (9,113 bytes)
3. Re: [RFI] New RFI (score: 1): Author: K9MA <k9ma@sdellington.us>; Date: Tue, 12 Jan 2021 10:31:23 -0600; I've also had success with the MFJ-856. However, when you get close to a strong source, it can overload and lock up. My solution was to make two wide straps of thin aluminum with which to short out t; /archives//html/RFI/2021-01/msg00061.html (10,503 bytes)
4. Re: [RFI] New RFI (score: 1): Author: Dave Cole <dave@nk7z.net>; Date: Tue, 12 Jan 2021 09:02:47 -0800; Some of the techniques for fixing these issues are: 1. I added a attenuator to the MFJ device. I moved the actual receiver down the mast, and ran coax, then added a step attenuator. 2. Once I "think"; /archives//html/RFI/2021-01/msg00062.html (12,605 bytes)
5. Re: [RFI] New RFI (score: 1): Author: David Eckhardt <davearea51a@gmail.com>; Date: Tue, 12 Jan 2021 18:41:42 +0000; Most recently, I have isolated a source on a power pole by using both the MFJ device AND a home brew 0.5-meter shielded loop connected to a battery-powered receiver tuned to the frequency of maximum; /archives//html/RFI/2021-01/msg00063.html (11,017 bytes)
6. Re: [RFI] New RFI (score: 1): Author: N4ZR <n4zr@comcast.net>; Date: Tue, 12 Jan 2021 16:22:31 -0500; I was a little surprised by Dave's strong advice against entering a home where RFI is located. On two occasions at my former townhouse QTH, I discovered that the source of RFI was "clickless" light; /archives//html/RFI/2021-01/msg00064.html (14,965 bytes)
7. Re: [RFI] New RFI (score: 1): Author: N4ZR <n4zr@comcast.net>; Date: Tue, 12 Jan 2021 16:25:59 -0500; Using a Moxon antenna is another way to get a sharper null - there was an article in QST describing such an antenna, which I use with a shirt-pocket handi-talkie with 136 MHz AM aircraft band. The n; /archives//html/RFI/2021-01/msg00065.html (11,326 bytes)
8. [RFI] New RFI (score: 1): Author: Charlie Delta via RFI <rfi@contesting.com>; Date: Tue, 12 Jan 2021 22:21:54 +0000 (UTC); Hi Pete QST March 2001, by K1BQT. I built the Moxon without the receiver and use it with a wideband HT. I built a simple step attenuator with 30 db of attenuation in 10 db steps. It works well. 73Cr; /archives//html/RFI/2021-01/msg00067.html (7,607 bytes)
9. Re: [RFI] New RFI (score: 1): Author: Dave Cole <dave@nk7z.net>; Date: Tue, 12 Jan 2021 15:07:20 -0800; Hi Pete, As the previous poster mentioned, this is more geared towards new, or unknown conditions... Most of the issues across the past five years, here in Eugene Oregon, are Pot Grows. Ninety percen; /archives//html/RFI/2021-01/msg00068.html (19,004 bytes)
10. Re: [RFI] New RFI (score: 1): Author: K9MA <k9ma@sdellington.us>; Date: Wed, 13 Jan 2021 00:06:40 -0600; It just depends on the neighbor. I guess I'm very fortunate that aside from the lady 25 years ago who was going to "Shoot my tower down", my neighbors have been very cooperative. Had I not gone in th; /archives//html/RFI/2021-01/msg00069.html (20,552 bytes)
11. Re: [RFI] New RFI (score: 1): Author: K9MA <k9ma@sdellington.us>; Date: Wed, 13 Jan 2021 00:11:35 -0600; I haven't tried using an antenna with a sharp null, but I wonder how well it really works with power line noise. The problem seems to be that the lines themselves radiate so much that it often appear; /archives//html/RFI/2021-01/msg00070.html (12,367 bytes)
12. Re: [RFI] New RFI (score: 1): Author: Charles Plunk <af4o@twc.com>; Date: Wed, 13 Jan 2021 00:40:52 -0600; Reminds me of the only complaint I have had many years ago. Three houses up i got a call and their son proceeded to cuss me out saying I was interfering with their TV. I was on 6m HSMS at 100w. He sa; /archives//html/RFI/2021-01/msg00071.html (8,431 bytes)
13. Re: [RFI] New RFI (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Wed, 13 Jan 2021 08:22:03 -0500; Hi Scott, The Moxon sounds interesting and I will have to build one for my tool box of DF antennas, nevertheless let me share my experience with my 136 MHz 4 element portable Yagi that has very deep; /archives//html/RFI/2021-01/msg00073.html (11,926 bytes)
14. Re: [RFI] New RFI (score: 1): Author: K9MA <k9ma@sdellington.us>; Date: Wed, 13 Jan 2021 08:21:11 -0600; Hi Don, My experience is very similar to yours, using the MFJ-856. To make sure I have the right source, I relay the audio from the HF receiver at home, and listen for a matching pattern on 135 MHz.; /archives//html/RFI/2021-01/msg00076.html (14,260 bytes)
15. Re: [RFI] New RFI (score: 1): Author: Joe <nss@mwt.net>; Date: Wed, 13 Jan 2021 08:23:27 -0600; I have used all sorts of direction finding stuff. From 2 meters Fox hunt stuff, to the 138~ Mhz AM yagi and scanner. BUT what I still find to be the absolute best is the simplest, And if you don't al; /archives//html/RFI/2021-01/msg00077.html (14,988 bytes)
16. Re: [RFI] New RFI (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Fri, 22 Jan 2021 09:51:25 -0500; As a follow up to the Moxon antenna suggestion a week or so ago, I built a couple of Moxon antennas this week (one for 146 MHz and one for 136 MHz) but ran into some problems with some online design; /archives//html/RFI/2021-01/msg00112.html (13,979 bytes)
17. Re: [RFI] New RFI (score: 1): Author: David Eckhardt <davearea51a@gmail.com>; Date: Fri, 22 Jan 2021 22:52:28 +0000; In working with our STEM students last year (before COVID), I ran into the same problem in using online Yagi designers. User beware on ALL these online antenna designers!!! I don't know where they ca; /archives//html/RFI/2021-01/msg00114.html (15,670 bytes)
18. Re: [RFI] New RFI (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Sat, 23 Jan 2021 14:25:10 -0800; On 1/22/2021 2:52 PM, David Eckhardt wrote: In working with our STEM students last year (before COVID), I ran into the same problem in using online Yagi designers. User beware on ALL these online ant; /archives//html/RFI/2021-01/msg00115.html (9,430 bytes)
19. Re: [RFI] New RFI (score: 1): Author: rogerh@internode.on.net; Date: Sun, 24 Jan 2021 10:10:38 +1100; Here "Down Below" (VK-ZL), the VK5DJ Yagi Calculator has proved to produce reliable Yagi designs that have been proven to work time out of number. "Yagi Calculator is a Windows program that also runs; /archives//html/RFI/2021-01/msg00119.html (9,377 bytes)
20. Re: [RFI] New RFI (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Sat, 23 Jan 2021 20:16:30 -0500; Hi Joe, I revisited the AM radio with internal bar antenna today on a known faulty power pole (bad lightning arrestor which is scheduled for replacement). I used two different AM radios (one was an E; /archives//html/RFI/2021-01/msg00121.html (18,711 bytes)

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