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1. Re: [RFI] Rain induced static (score: 1)
Author: "Don Moman VE6JY" <ve6jy.1@gmail.com>
Date: Tue, 4 Dec 2007 18:15:49 +0000
Mostly, corona is a fact of life - the voltage is higher than the damp air around the conductor can insulate. The following link sums it up: http://www.sciam.com/physics/article/id/what-causes-the-no
/archives//html/RFI/2007-12/msg00007.html (10,358 bytes)

2. Re: [RFI] Rain induced static (score: 1)
Author: "Don Moman VE6JY" <ve6jy.1@gmail.com>
Date: Tue, 4 Dec 2007 22:07:02 +0000
Yes that is how it normally works on lower voltage lines... the rain does 2 things right away - swells the wood so the hardware gets tight; and gets in between any nuts/washers and "bonds" them. Most
/archives//html/RFI/2007-12/msg00009.html (9,026 bytes)

3. Re: [RFI] [Fwd: Noise Follow up] (score: 1)
Author: "Don Moman VE6JY" <ve6jy.1@gmail.com>
Date: Thu, 27 Nov 2008 03:22:27 +0000
If it's *exactly* like noise source # 3, then it is not coming from someones house. Don't be mislead. That is classic 100% loose hardware type noise. I bet it goes away with wet weather, too. It is e
/archives//html/RFI/2008-11/msg00054.html (11,782 bytes)

4. Re: [RFI] Unknown Signals on 20 and 17 (score: 1)
Author: Don Moman VE6JY <ve6jy.1@gmail.com>
Date: Wed, 1 Apr 2009 01:19:55 +0000
This is likely the "Havana Gurgler" Cuban jamming signal. Been around for quite a while, esp on 18090; but the 20m frequencies are new to me. 73 Don VE6JY ____________________________________________
/archives//html/RFI/2009-03/msg00067.html (7,917 bytes)

5. Re: [RFI] RF Feedback - FL7000 AMP (score: 1)
Author: Don Moman VE6JY <ve6jy.1@gmail.com>
Date: Wed, 19 Aug 2009 14:57:03 +0000
It's not an RF feedback issue. The FL7000 is super touchy on overdrive in SSB and you need to do the mods to desensitize the protection circuitry. The unit I have, it was imposible to get near rated
/archives//html/RFI/2009-08/msg00008.html (8,029 bytes)

6. Re: [RFI] Update on the Boston area RFI (score: 1)
Author: Don Moman VE6JY <ve6jy.1@gmail.com>
Date: Sat, 13 Feb 2010 21:07:08 +0000
Utility companies routinely use hammers as part of their on going pole testing procedure. A 22 oz framing hammer is used to contact the pole in each of 4 quadrants ranging from as high as the person
/archives//html/RFI/2010-02/msg00071.html (9,715 bytes)

7. Re: [RFI] Does a power pole generating RFI always generate ultrasonics? (score: 1)
Author: Don Moman VE6JY <ve6jy.1@gmail.com>
Date: Tue, 8 Jun 2010 01:12:26 +0100
Quite a few sources do not generate enough ultrasonic energy to be heard on the ground. But an ultrasonic sniffer on a hotstick (ONLY operated by a qualified lineman) positioned within a few inches o
/archives//html/RFI/2010-06/msg00012.html (9,998 bytes)

8. Re: [RFI] HomePlug Experience? (score: 1)
Author: Don Moman VE6JY <ve6jy.1@gmail.com>
Date: Thu, 7 Oct 2010 12:14:31 -0600
On a related matter to CAT5 radiation (not a HomePlug issue), I have noise issues on 10m and 15m from a co-located internet provider (ISP). Their equipment is on a 150 foot tower that has a stack of
/archives//html/RFI/2010-10/msg00009.html (10,572 bytes)

9. Re: [RFI] POwer line noise (cont) (score: 1)
Author: Don Moman VE6JY <ve6jy.1@gmail.com>
Date: Mon, 11 Oct 2010 20:38:02 +0000
in my experience (and I just concluded finding another one a few weeks ago, the power company finally isolated it and confirmed it) when the noise remains in the rain it is a transformer issue - micr
/archives//html/RFI/2010-10/msg00032.html (10,561 bytes)

10. Re: [RFI] Interesting Noise (score: 1)
Author: Don Moman VE6JY <ve6jy.1@gmail.com>
Date: Fri, 11 Mar 2011 02:54:49 +0000
Sounds like precipitation static... very common up here. caused by water (or snow) molecules rubbing together, nothing to do with power lines - other than the moisture usually quiets most types of lo
/archives//html/RFI/2011-03/msg00036.html (7,604 bytes)

11. Re: [RFI] Ultrasonic Dish (score: 1)
Author: Don Moman VE6JY <ve6jy.1@gmail.com>
Date: Thu, 3 Jan 2013 00:18:36 +0000
I get that a lot here, loud on 2m, not there at 440. Need a nice little 220 meg antenna to fill the gap so I was using a channel 13 yagi for that area along with the ICOM R-10 wideband rx. Also find
/archives//html/RFI/2013-01/msg00028.html (10,427 bytes)

12. Re: [RFI] More on "my" noise. (score: 1)
Author: Don Moman VE6JY <ve6jy.1@gmail.com>
Date: Mon, 28 Apr 2014 17:19:12 +0000
As other have said STANAG is very common on HF. I have used SIGMIRA software in the past to decode it. I hear the signal on 4286 khz very loud here at almost any time, even now (almost midday) it is
/archives//html/RFI/2014-04/msg00214.html (12,567 bytes)

13. Re: [RFI] More on "my" noise. (score: 1)
Author: Don Moman VE6JY <ve6jy.1@gmail.com>
Date: Mon, 28 Apr 2014 18:25:07 +0000
Just in the last few minutes I have logged into remote Perseus receivers near Vancouver and Seattle and the spectrum in and around 4286khz is normal with no indication of any wide band noise. The sou
/archives//html/RFI/2014-04/msg00221.html (12,219 bytes)

14. Re: [RFI] Utility coming tomorrow to chase RFI (score: 1)
Author: Don Moman VE6JY <ve6jy.1@gmail.com>
Date: Thu, 5 Jun 2014 21:11:37 -0600
Paul, I've used the ICOM R-10 for many years for power line noise hunting up as high as 900 megs and it works reasonably well for me. The S meter action is more as you describe but the audio AGC is s
/archives//html/RFI/2014-06/msg00038.html (12,187 bytes)

15. Re: [RFI] ROTHR Interference? (score: 1)
Author: Don Moman VE6JY <ve6jy.1@gmail.com>
Date: Tue, 30 Sep 2014 13:02:48 -0600
I hear it on 80m, often covers from ~3.3 to 3.750 in one chunk before it moves on... Noticed it last winter/spring but it seems to be more regular now and a bit stronger. I must comment on your QRZ p
/archives//html/RFI/2014-09/msg00083.html (10,853 bytes)

16. Re: [RFI] 40 Meter OTH Radar? (score: 1)
Author: Don Moman VE6JY <ve6jy.1@gmail.com>
Date: Mon, 14 Dec 2015 06:28:45 +0000
Well I'm equally "pretty sure" this isn't the Chinese radar. I hear the Chinese stuff regularly on 40 and other frequencies and this is quite different. Doesn't mean it can't be something different f
/archives//html/RFI/2015-12/msg00074.html (11,034 bytes)

17. Re: [RFI] 1 of 31 re: Using an SDR to locate RFI (score: 1)
Author: Don Moman VE6JY <ve6jy.1@gmail.com>
Date: Mon, 12 Dec 2016 18:55:47 +0000
The display of the 756PRO series is excellent, I think because its sweep is close to 60 hz so the interference is almost synced so it stands out well. I will often use it if I'm looking at a fairly n
/archives//html/RFI/2016-12/msg00037.html (11,503 bytes)

18. Re: [RFI] RTTY signal on 3595.5 kHz (score: 1)
Author: Don Moman VE6JY <ve6jy.1@gmail.com>
Date: Thu, 25 Jan 2018 23:01:37 +0000
checking a recording here... something similar was noted at 0558 Jan 16th.... very weak in Alberta. looks like two digital signals centered around 3595.450 khz... at the beginning of each segment the
/archives//html/RFI/2018-01/msg00063.html (11,515 bytes)

19. Re: [RFI] Common mode choke on 4 Square feedlines without skewing phasing? (score: 1)
Author: Don Moman VE6JY <ve6jy.1@gmail.com>
Date: Wed, 23 Jan 2019 13:06:27 -0700
On all the 4 squares here (2 on 80 and 1 on 160m) I have both buried and put ferrites (lots) on all the lines to the individual vertical elements. With the phasing lines I used there wasn't much exce
/archives//html/RFI/2019-01/msg00028.html (8,823 bytes)

20. Re: [RFI] Guidance on finding noise? (score: 1)
Author: Don Moman VE6JY <ve6jy.1@gmail.com>
Date: Tue, 14 Jan 2020 05:31:51 +0000
Don't overlook the situation of a micro arc inside the transformer can. These (in my experience) have a very strong low frequency component with little high frequency energy. They are a bear to pin d
/archives//html/RFI/2020-01/msg00101.html (12,863 bytes)

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