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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[RFI\]\s+\[BULK\]\s+Re\:\s+Ambient\s+Noise\s+Levels\s*$/: 11 ]

Total 11 documents matching your query.

1. Re: [RFI] [BULK] Re: Ambient Noise Levels (score: 1)
Author: "Jim P" <jvpoll@dallas.net>
Date: Wed, 9 Aug 2006 23:37:54 -0500
Jim, I think I can sum up what you said then thusly: The multiplicity of non-intentinal emitters in the 'skip zone' contributes to the overall observed rise in noise level by the effect of summation
/archives//html/RFI/2006-08/msg00011.html (10,688 bytes)

2. Re: [RFI] [BULK] Re: Ambient Noise Levels (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 09 Aug 2006 22:18:57 -0700
Of course the noise at any location will be the sum of noise from many sources, some of them local, some of them distant. A few of those that are local may be close enough to be in their near field.
/archives//html/RFI/2006-08/msg00012.html (8,352 bytes)

3. Re: [RFI] [BULK] Re: Ambient Noise Levels (score: 1)
Author: "Jim P" <jvpoll@dallas.net>
Date: Thu, 10 Aug 2006 09:14:25 -0500
"But for most sources, the transition from near to far field occurs at roughly 1/6 wavelength" I don't believe sources I cited not a month of two back are in agreement with that statement NOR does it
/archives//html/RFI/2006-08/msg00016.html (9,669 bytes)

4. Re: [RFI] [BULK] Re: Ambient Noise Levels (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Thu, 10 Aug 2006 08:51:13 -0700
One excellent source is "Noise Reduction Techniques in Electronic Systems" by Henry Ott. The 2nd edition was published in 1988, and is in print. You can order it from any standard source, and also fr
/archives//html/RFI/2006-08/msg00017.html (9,627 bytes)

5. Re: [RFI] [BULK] Re: Ambient Noise Levels (score: 1)
Author: "Tom Rauch" <w8ji@contesting.com>
Date: Thu, 10 Aug 2006 11:59:15 -0400
Far field generally is at distance beyond 1/2 wl or 1 wl for small antennas but can be further for very large antennas. In a small loop the field is magnetically dominant within about 1/10th wave, a
/archives//html/RFI/2006-08/msg00018.html (11,797 bytes)

6. Re: [RFI] [BULK] Re: Ambient Noise Levels (score: 1)
Author: Bill Tippett <btippett@alum.mit.edu>
Date: Thu, 10 Aug 2006 14:41:55 -0400
W8JI: Barnesville or Forsyth during the daytime on my 160 transmitting verticals. Beaming south or north away from both Barnesville (7 miles to the west) and Forsyth (7 miles east), noise is 10dB les
/archives//html/RFI/2006-08/msg00022.html (7,988 bytes)

7. Re: [RFI] [BULK] Re: Ambient Noise Levels (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Thu, 10 Aug 2006 12:30:30 -0700
NO! I didn't say that. I quoted someone (who signed "JimP") who said something I disagreed with and said that I disagreed! And then someone quoted some of my post in a way that attributed it to me, I
/archives//html/RFI/2006-08/msg00023.html (6,877 bytes)

8. Re: [RFI] [BULK] Re: Ambient Noise Levels (score: 1)
Author: "Jim P" <jvpoll@dallas.net>
Date: Fri, 11 Aug 2006 19:32:14 -0500
Tom, I would believe you, maybe, if it wasn't for evidence and measurements and observations like this made with test equipment: Relative strengths of two alternative l.f. antennas: o E-field antenna
/archives//html/RFI/2006-08/msg00031.html (10,485 bytes)

9. Re: [RFI] [BULK] Re: Ambient Noise Levels (score: 1)
Author: "Tom Rauch" <w8ji@contesting.com>
Date: Fri, 11 Aug 2006 21:41:36 -0400
Don't shoot the messenger! If you don't want to believe everyone from Faraday and Maxwell on down the food chain there probably isn't much I can do about it. What does that have to do with anything?
/archives//html/RFI/2006-08/msg00033.html (11,896 bytes)

10. Re: [RFI] [BULK] Re: Ambient Noise Levels (score: 1)
Author: "Jim P" <jvpoll@dallas.net>
Date: Fri, 11 Aug 2006 20:56:02 -0500
The noise I heard didn't occur but about three times that I recall and that was weeks to months apart. (After the 1st - or was it the 2nd - time I noticed it I was primed to note the time and observe
/archives//html/RFI/2006-08/msg00034.html (21,081 bytes)

11. Re: [RFI] [BULK] Re: Ambient Noise Levels (score: 1)
Author: "Tom Rauch" <w8ji@contesting.com>
Date: Sat, 12 Aug 2006 00:16:41 -0400
Jim, Let's deal with one basic useful fact at a time. Certainly, as long as it is static and not time-varying at high frequencies. Once the sheet is several skin depths thick, the answer is no. I'm n
/archives//html/RFI/2006-08/msg00036.html (11,112 bytes)

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