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References: [ +from:aaron@campusactivism.org: 40 ]

Total 40 documents matching your query.

21. [RFI] Tecsun PL-380 - Is 50 dbu a "Bad Pole"? (score: 1)
Author: Aaron Kreider <aaron@campusactivism.org>
Date: Mon, 09 Sep 2013 16:34:29 -0400
I've tested a bunch of poles in the neighborhood using AM and the small portable Tecsun PL-380. The second nearest pole has a maximum 50 dbu signal measurement- if I put the radio right next to the g
/archives//html/RFI/2013-09/msg00015.html (7,177 bytes)

22. [RFI] choking the service line (score: 1)
Author: Aaron Kreider <aaron@campusactivism.org>
Date: Mon, 09 Sep 2013 16:49:59 -0400
How much attenuation can I get for 2 mhz to 6 mhz, per choke, by using monster chokes (material 31, 1 inch ID) on the service line? What is the regular impedance of the service line at these frequenc
/archives//html/RFI/2013-09/msg00016.html (6,633 bytes)

23. [RFI] Ferrites for < 500 khz (score: 1)
Author: Aaron Kreider <aaron@campusactivism.org>
Date: Tue, 10 Sep 2013 16:15:46 -0400
Are there ferrites for RFI rejection in the 50 khz - 500 khz range? I've been using material #31 and wonder if there is something more useful? If so, where can I buy it? Aaron _______________________
/archives//html/RFI/2013-09/msg00022.html (8,003 bytes)

24. Re: [RFI] choking the service line (score: 1)
Author: Aaron Kreider <aaron@campusactivism.org>
Date: Tue, 10 Sep 2013 19:17:03 -0400
Has anyone ever tried covering the service line with tin foil, foil tape, or conduit? That'd probably provide the best attenuation other than burying it. Does anyone make a snap-on conduit? If you ha
/archives//html/RFI/2013-09/msg00024.html (9,273 bytes)

25. [RFI] Short wideband noise bursts 3-100+ mhz (score: 1)
Author: Aaron Kreider <aaron@campusactivism.org>
Date: Tue, 24 Sep 2013 18:35:07 -0400
I've got very short noise bursts coming from a nearby house. Unlike my other noises (power supplies, general hash) this is the first one that I can really narrow down - as I can hear it from 3-110 mh
/archives//html/RFI/2013-09/msg00053.html (8,049 bytes)

26. [RFI] Adding a shield to the utility service lines? (score: 1)
Author: Aaron Kreider <aaron@campusactivism.org>
Date: Thu, 05 Dec 2013 00:33:18 -0500
Have you ever heard of a shielding product that would clamp on to existing utility service lines? I'm interested in shielding the service lines from PECO that run in a T shape on my small city lot. I
/archives//html/RFI/2013-12/msg00049.html (8,717 bytes)

27. Re: [RFI] Adding a shield to the utility service lines? (score: 1)
Author: Aaron Kreider <aaron@campusactivism.org>
Date: Fri, 06 Dec 2013 19:25:59 -0500
Thanks for you advice. Yes, it is. Shielding addresses differential mode RFI, and most trash on power lines is a common mode signal and radiates just like any other antenna. Although I tried a bunch
/archives//html/RFI/2013-12/msg00069.html (8,687 bytes)

28. Re: [RFI] LED Bulbs (score: 1)
Author: Aaron Kreider <aaron@campusactivism.org>
Date: Mon, 10 Feb 2014 21:46:09 -0500
I bought some Chinese LED bulbs on Ebay which were terrible (and they also were running at half of the stated power and dim - possibly because we have 110 volts, not 220). The LED bulbs I've bought a
/archives//html/RFI/2014-02/msg00030.html (9,405 bytes)

29. [RFI] Portable sdr Setup for Tracking RFI (score: 1)
Author: Aaron Kreider <aaron@campusactivism.org>
Date: Sat, 28 Feb 2015 17:17:55 -0500
I'm brainstorming about a portable sdr setup for tracking RFI and how to make it as convenient/portable as possible. Has anyone tried this? If so what would you recommend? I want to use SDR because I
/archives//html/RFI/2015-02/msg00100.html (9,636 bytes)

30. [RFI] Impedance at 60 hz (score: 1)
Author: Aaron Kreider <aaron@campusactivism.org>
Date: Fri, 22 May 2015 11:28:30 -0400
How close is the impedance at 60 hz for material 31 to zero? I want to filter the inputs and outputs to my 5000 watt solar inverter with ferrite chokes, and I'm wondering if there is any risk of over
/archives//html/RFI/2015-05/msg00026.html (7,094 bytes)

31. Re: [RFI] Impedance at 60 hz (score: 1)
Author: Aaron Kreider <aaron@campusactivism.org>
Date: Fri, 22 May 2015 15:36:13 -0400
I've already got the inverter. It is a Fronius IG plus 5000 model. The output is 240 VAC. And the maximum current should be 20.8 amps. I've noticed the interference primarily in the lower part of the
/archives//html/RFI/2015-05/msg00028.html (8,305 bytes)

32. [RFI] Vibrating Ferrite Chokes on Service Line (score: 1)
Author: Aaron Kreider <aaron@campusactivism.org>
Date: Sun, 12 Jul 2015 22:00:07 -0400
So I finally got around to putting monster chokes on the service line that feeds my house and several neighbors. 3 chokes on each line (positive, negative, and neutral) with zero turns (as the wire i
/archives//html/RFI/2015-07/msg00025.html (8,925 bytes)

33. Re: [RFI] Vibrating Ferrite Chokes on Service Line (score: 1)
Author: Aaron Kreider <aaron@campusactivism.org>
Date: Wed, 15 Jul 2015 17:30:52 -0400
Jim, Thanks for the feedback! Unfortunately the lines are too big to fit through a single ferrite. Does anyone make a ferrite choke with a 2.5 inch inner-diameter? Otherwise I'm working on finding be
/archives//html/RFI/2015-07/msg00032.html (11,550 bytes)

34. Re: [RFI] Vibrating Ferrite Chokes on Service Line (score: 1)
Author: Aaron Kreider <aaron@campusactivism.org>
Date: Wed, 15 Jul 2015 17:39:10 -0400
Here is a short video - for your amusement: https://youtu.be/cgP4B3_K8c8 _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listin
/archives//html/RFI/2015-07/msg00033.html (7,361 bytes)

35. [RFI] 17 mhz - 25 mhz - Distorted audio every 250 khz (score: 1)
Author: Aaron Kreider <aaron@campusactivism.org>
Date: Fri, 28 Aug 2015 16:14:58 -0400
I recorded this RFI. It is about every 250 khz. Sounds like a distorted tv station. It is distorted in both AM and FM. It might be coming from one of the TV cables near my antenna or someone's tv. It
/archives//html/RFI/2015-08/msg00084.html (8,043 bytes)

36. Re: [RFI] How do I know if LED bulbs are noisy? (score: 1)
Author: Aaron Kreider <aaron@campusactivism.org>
Date: Mon, 21 Mar 2016 20:52:20 -0400
Try a portable AM radio right next to them. I just replaced 6 CFLs in the basement (within 15 of the shack) with GE LED bulbs. I can't tell whether the environment has gotten any worse... the noise l
/archives//html/RFI/2016-03/msg00070.html (7,972 bytes)

37. [RFI] impedance mismatching in coax (score: 1)
Author: Aaron Kreider <aaron@campusactivism.org>
Date: Wed, 28 Dec 2016 13:02:32 -0500
Over Christmas I built a temporary/quick beverage antenna in a rural area, but it had a very high noise level. I had chokes on everything which helped, but as I hadn't a lot of planning - I ended up
/archives//html/RFI/2016-12/msg00091.html (7,888 bytes)

38. Re: [RFI] impedance mismatching in coax (score: 1)
Author: Aaron Kreider <aaron@campusactivism.org>
Date: Wed, 28 Dec 2016 16:13:31 -0500
There wasn't any ground. So I should have one of those (though in my city experience, a ground hasn't helped). I'll probably build a better beverage (and terminate it) or KAZ antenna eventually. The
/archives//html/RFI/2016-12/msg00095.html (10,064 bytes)

39. [RFI] FIOS vs DSL (score: 1)
Author: Aaron Kreider <aaron@campusactivism.org>
Date: Wed, 22 Feb 2017 18:35:51 -0500
I'm thinking of switching from Verizon DSL to Comcast FIOS for faster and more reliable internet. I'm hoping that the FIOS will be cleaner in terms of RFI. What possible sources of RFI are there from
/archives//html/RFI/2017-02/msg00048.html (7,304 bytes)

40. Re: [RFI] Window Air Conditioner Advice Wanted (score: 1)
Author: Aaron Kreider <aaron@campusactivism.org>
Date: Sat, 14 Jul 2018 00:32:57 -0400
Two might be the way to go.  A lot easier to install smaller units if you're doing it yourself. Or if you are willing to spend a bit extra, you could try a mini split.  You can double the efficiency
/archives//html/RFI/2018-07/msg00099.html (11,468 bytes)

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