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Total 571 documents matching your query.

101. Re: [RFI] A fun and educational RFI toy. (score: 1)
Author: "KD7JYK DM09" <kd7jyk@earthlink.net>
Date: Wed, 29 Feb 2012 14:51:26 -0800
I have not experienced this with my unit (hopefully won't). The output is very low, I can only make an educated guess at the moment without equipment set up to test it, but based on the sensitivity
/archives//html/RFI/2012-02/msg00049.html (9,774 bytes)

102. Re: [RFI] A fun and educational RFI toy. (score: 1)
Author: "KD7JYK DM09" <kd7jyk@earthlink.net>
Date: Thu, 1 Mar 2012 11:00:20 -0800
It is, but rather than take it to the shop and verify a ten year old measurement for the sake of a moments worth of posting, I ran the number off the top of my head within about 0dB. The 225nV numbe
/archives//html/RFI/2012-03/msg00002.html (7,584 bytes)

103. Re: [RFI] Receiver settings for hearing RFI? (score: 1)
Author: "KD7JYK DM09" <kd7jyk@earthlink.net>
Date: Sun, 11 Mar 2012 18:36:31 -0700
The experience of two hams that used one of these and myself who wound up with it... Garbage. No, not defective, but no selectivity, no directivity. Although one would think it works in theory, in r
/archives//html/RFI/2012-03/msg00020.html (8,881 bytes)

104. Re: [RFI] Solar Inverter. (score: 1)
Author: "KD7JYK DM09" <kd7jyk@earthlink.net>
Date: Sat, 24 Mar 2012 12:33:31 -0700
_______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi
/archives//html/RFI/2012-03/msg00038.html (7,662 bytes)

105. Re: [RFI] RFI issues in electric (or hybrid) vehicles (score: 1)
Author: "KD7JYK DM09" <kd7jyk@earthlink.net>
Date: Tue, 10 Apr 2012 16:29:02 -0700
When I monitor HF while mobile in SSB with noise blankers and DSP turned on to entirely eliminate noise generated by my own vehicle, I hear the bloody Prius cars nearly a quarter mile away on a 5' w
/archives//html/RFI/2012-04/msg00014.html (7,937 bytes)

106. Re: [RFI] RFI issues in electric (or hybrid) vehicles (score: 1)
Author: "KD7JYK DM09" <kd7jyk@earthlink.net>
Date: Tue, 10 Apr 2012 20:42:57 -0700
Well, whoopity-doo for you. In the meantime, I've heard them at great distances over several years and can tell when they are coming, even when I can't see them, for example on another road, behind
/archives//html/RFI/2012-04/msg00020.html (9,588 bytes)

107. Re: [RFI] RFI issues in electric (or hybrid) vehicles (score: 1)
Author: "KD7JYK DM09" <kd7jyk@earthlink.net>
Date: Wed, 11 Apr 2012 15:59:16 -0700
You left out a couple of important factors. How strong the RFI is to begin with and how sensitive my equipment is, so despite all the math, it's worthless. Reasonable or not, this is what I have seen
/archives//html/RFI/2012-04/msg00030.html (10,267 bytes)

108. Re: [RFI] RFI issues in electric (or hybrid) vehicles (score: 1)
Author: "KD7JYK DM09" <kd7jyk@earthlink.net>
Date: Mon, 16 Apr 2012 12:07:02 -0700
"As regards the early Toyota engine control modules: yes, the Camry, in particular, got a big "black eye" in the early 90's (as I recall) with hams who installed mobile rigs and found that more than
/archives//html/RFI/2012-04/msg00048.html (8,881 bytes)

109. Re: [RFI] MFJ-856 (score: 1)
Author: "KD7JYK DM09" <kd7jyk@earthlink.net>
Date: Sun, 22 Apr 2012 19:52:42 -0700
where noise is relatively everywhere, it is useless. Readings are the same pointing at a source, the ground or the sky when tracking down power line noise. The unit we used is now on a shelf, the pa
/archives//html/RFI/2012-04/msg00056.html (7,029 bytes)

110. Re: [RFI] The MFJ-856 worked wonders for me! (score: 1)
Author: "KD7JYK DM09" <kd7jyk@earthlink.net>
Date: Thu, 10 May 2012 11:36:00 -0700
Very pleased to hear it is working well for you! Kurt _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi
/archives//html/RFI/2012-05/msg00009.html (7,439 bytes)

111. Re: [RFI] 30 Meter RFI?? (score: 1)
Author: "KD7JYK DM09" <kd7jyk@earthlink.net>
Date: Sun, 20 May 2012 21:57:05 -0700
I've been listening in Nevada, nothing heard. Is it continuous? Does it come on at certain times? Do you have a small recording? Kurt _______________________________________________ RFI mailing list
/archives//html/RFI/2012-05/msg00034.html (7,017 bytes)

112. Re: [RFI] Another strange noisy (score: 1)
Author: "KD7JYK DM09" <kd7jyk@earthlink.net>
Date: Fri, 1 Jun 2012 11:20:56 -0700
Was it a sweeping "ray gun" type sound? If so, 99% chance it was CODAR. It's throughout HF and wrecks various bands, including Ham bands. Did you get a small recording? Kurt -- Original Message -- __
/archives//html/RFI/2012-06/msg00010.html (7,004 bytes)

113. Re: [RFI] Another strange noisy (score: 1)
Author: "KD7JYK DM09" <kd7jyk@earthlink.net>
Date: Fri, 1 Jun 2012 13:06:44 -0700
"CODAR is becoming the bane of SW listening. It's the IBOC of SW..." I monitor Class C telemetry just below 10m, I even hear it there. Seems it's everywhere. Bloody annoyance... Kurt ________________
/archives//html/RFI/2012-06/msg00013.html (6,913 bytes)

114. Re: [RFI] Introduction - power line noise (score: 1)
Author: "KD7JYK DM09" <kd7jyk@earthlink.net>
Date: Sun, 24 Jun 2012 16:48:02 -0700
"I am all too often identifying adjacent pairs of poles as "noisy". This doesn't feel right to me. I suspect only one of each pair is the actual source. In three separate locations, the power company
/archives//html/RFI/2012-06/msg00037.html (7,653 bytes)

115. Re: [RFI] Lightning Protection (score: 1)
Author: "KD7JYK DM09" <kd7jyk@earthlink.net>
Date: Sun, 1 Jul 2012 21:21:55 -0700
"I asked them about these corona brushes and was told that they are ineffective. Once the electric field exceeds about 50-100 kV per meter, everything -- grass, trees, fences, antennas -- are all in
/archives//html/RFI/2012-07/msg00017.html (7,819 bytes)

116. Re: [RFI] RFI & Alarm Systems? (score: 1)
Author: "KD7JYK DM09" <kd7jyk@earthlink.net>
Date: Sun, 29 Jul 2012 21:14:14 -0700
Depends on the system. I have both interfered with and triggered alarms, even set of entire multi-story buildings, condos and houses when driving down the road. I also had a problem with triggering
/archives//html/RFI/2012-07/msg00056.html (7,206 bytes)

117. Re: [RFI] RFI & Alarm Systems? (score: 1)
Author: "KD7JYK DM09" <kd7jyk@earthlink.net>
Date: Mon, 30 Jul 2012 22:49:31 -0700
"What frequency(ies) are these wireless secirity systems operating in - 434, 390, 902, 2400 MHz? And how are the sensors powered, via coin cells?" It really depends on the system. I have bits and pie
/archives//html/RFI/2012-07/msg00063.html (8,688 bytes)

118. Re: [RFI] RFI & Alarm Systems? (score: 1)
Author: "KD7JYK DM09" <kd7jyk@earthlink.net>
Date: Thu, 2 Aug 2012 20:53:12 -0700
What exactly are you hearing from it? Intentional RF or incidental? There is an ISM band (Part 15) from 433.05 to 434.79. I usually monitor 433.925, 434.000 and 434.500, but I have equipment operati
/archives//html/RFI/2012-08/msg00003.html (8,171 bytes)

119. Re: [RFI] RFI & Alarm Systems? (score: 1)
Author: "KD7JYK DM09" <kd7jyk@earthlink.net>
Date: Fri, 3 Aug 2012 16:46:00 -0700
The stuff I mentioned is licensed to operate on those frequencies, all mentioned, plus MORE. No broadcasts, no jamming, that's where they belong. All the alarms and even anti-lock brakes on cars I'v
/archives//html/RFI/2012-08/msg00007.html (7,683 bytes)

120. Re: [RFI] RFI & Alarm Systems? (score: 1)
Author: "KD7JYK DM09" <kd7jyk@earthlink.net>
Date: Fri, 3 Aug 2012 17:24:51 -0700
No, all the freqs I mentioned are ones I happen to know off the top of my head used for wireless alarm systems. Even the 440 MHz stuff. I've never noted RFI from one, though I suppose the electronic
/archives//html/RFI/2012-08/msg00009.html (8,835 bytes)

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