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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[RFI\]\s+Noise\s+Level\s+During\s+Power\s+Outage\s*$/: 19 ]

Total 19 documents matching your query.

1. [RFI] Noise Level During Power Outage (score: 1)
Author: K9MA <k9ma@sdellington.us>
Date: Tue, 31 Jan 2023 23:21:42 -0600
My QTH is in an older residential area, surrounded by overhead power lines. Line noise is a constant problem. We recently had a major power outage, so I measured the noise levels to get a baseline wi
/archives//html/RFI/2023-02/msg00000.html (8,909 bytes)

2. Re: [RFI] Noise Level During Power Outage (score: 1)
Author: K9MA <k9ma@sdellington.us>
Date: Tue, 31 Jan 2023 23:26:41 -0600
That table didn't come out very well at all. Here's a link to the pdf: https://sdellington.us/hr/RFI/Power%20Outage.pdf 73, Scott K9MA On 1/31/2023 11:21 PM, K9MA wrote: My QTH is in an older residen
/archives//html/RFI/2023-02/msg00001.html (8,737 bytes)

3. Re: [RFI] Noise Level During Power Outage (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Wed, 1 Feb 2023 00:33:46 -0800
Hi Scott, How do you know that it's line noise, not electronic noise? 25 years ago, line noise was a good assumption for anything we heard on the bands, but in almost any developed area, the average
/archives//html/RFI/2023-02/msg00002.html (8,612 bytes)

4. Re: [RFI] Noise Level During Power Outage (score: 1)
Author: K9MA <k9ma@sdellington.us>
Date: Wed, 1 Feb 2023 06:52:39 -0600
Hi Jim, I've had some noise sources which were electronic, but most have been power line related. Besides the preponderance of 120 Hz harmonics in the AM audio, the very broadband nature of line nois
/archives//html/RFI/2023-02/msg00004.html (9,596 bytes)

5. Re: [RFI] Noise Level During Power Outage (score: 1)
Author: Pete Smith N4ZR <pete.n4zr@gmail.com>
Date: Wed, 1 Feb 2023 09:25:51 -0500
I am green with envy - my local line noise is currently "only" S5 73, Pete N4ZR https://sdellington.us/hr/RFI/Power%20Outage.pdf 73, Scott K9MA On 1/31/2023 11:21 PM, K9MA wrote: My QTH is in an olde
/archives//html/RFI/2023-02/msg00005.html (10,186 bytes)

6. Re: [RFI] Noise Level During Power Outage (score: 1)
Author: Pete Smith N4ZR <pete.n4zr@gmail.com>
Date: Wed, 1 Feb 2023 09:27:18 -0500
How about a big dose of 60 and 120-buzz? 73, Pete N4ZR On 2/1/2023 3:33 AM, Jim Brown wrote: On 1/31/2023 9:21 PM, K9MA wrote: My QTH is in an older residential area, surrounded by overhead power lin
/archives//html/RFI/2023-02/msg00006.html (9,941 bytes)

7. Re: [RFI] Noise Level During Power Outage (score: 1)
Author: "Hare, Ed, W1RFI" <w1rfi@arrl.org>
Date: Wed, 1 Feb 2023 14:44:41 +0000
The first step to differentiate between an arcing or sparking noise source and the millions of devices that an generate noise is to tune the band. If the noise is not steady with frequency, but appea
/archives//html/RFI/2023-02/msg00007.html (13,998 bytes)

8. Re: [RFI] Noise Level During Power Outage (score: 1)
Author: K9MA <k9ma@sdellington.us>
Date: Wed, 1 Feb 2023 09:32:28 -0600
Don't be too envious, Pete.  Those levels are from the K4 panadapter with a 10 kHz span, which means a noise bandwidth of about 20 Hz. (Resolution bandwidth 11 Hz.) Besides, I have a power splitter a
/archives//html/RFI/2023-02/msg00009.html (11,817 bytes)

9. Re: [RFI] Noise Level During Power Outage (score: 1)
Author: Pete Smith N4ZR <pete.n4zr@gmail.com>
Date: Wed, 1 Feb 2023 10:55:36 -0500
OK, a bit of apples and oranges.  I have two powerline sources, and when both are active my noise level is ~s8-9 on 10 meters in AM bandwidth. I am less than 100 yards from a very high voltage line,
/archives//html/RFI/2023-02/msg00011.html (12,356 bytes)

10. Re: [RFI] Noise Level During Power Outage (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Wed, 1 Feb 2023 10:51:08 -0800
120 Hz is also a strong component of electronic noise generated by power supplies and power control equipment. The audio spectrum is not a great clue -- the RF/IF waterfall shows where the bodies are
/archives//html/RFI/2023-02/msg00017.html (8,995 bytes)

11. Re: [RFI] Noise Level During Power Outage (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Wed, 1 Feb 2023 10:55:08 -0800
A high voltage distribution line borders my property, within a few hundred feet of my antennas. Most of the time, of the noise I hear comes from the homes of neighbors -- three solar systems and lots
/archives//html/RFI/2023-02/msg00018.html (8,994 bytes)

12. Re: [RFI] Noise Level During Power Outage (score: 1)
Author: K9MA <k9ma@sdellington.us>
Date: Wed, 1 Feb 2023 14:06:43 -0600
120 Hz is also a strong component of electronic noise generated by power supplies and power control equipment. The audio spectrum is not a great clue -- the RF/IF waterfall shows where the bodies are
/archives//html/RFI/2023-02/msg00023.html (9,458 bytes)

13. Re: [RFI] Noise Level During Power Outage (score: 1)
Author: Gary NA6O via RFI <rfi@contesting.com>
Date: Wed, 1 Feb 2023 13:22:25 -0800
I have an LED fixture for you that produces 120 Hz buzz over decades of bandwidth, nearly indistinguishable from an arcing power line: The Elite RL675. Twenty-one of these, installed next door, resu
/archives//html/RFI/2023-02/msg00027.html (9,871 bytes)

14. Re: [RFI] Noise Level During Power Outage (score: 1)
Author: Don Kirk <wd8dsb@gmail.com>
Date: Wed, 1 Feb 2023 16:28:03 -0500
Hi Scott, You said "I have never seen broadband noise with 120 Hz harmonics in the AM audio which was NOT power line noise. And, alas, I've seen a lot of line noise." I personally have experienced br
/archives//html/RFI/2023-02/msg00028.html (11,870 bytes)

15. Re: [RFI] Noise Level During Power Outage (score: 1)
Author: Pete Smith N4ZR <pete.n4zr@gmail.com>
Date: Wed, 1 Feb 2023 17:07:26 -0500
Very interesting and timely (at least for me).  I am at the beginning of an extensive basement redo, which will involve on the order of a dozen round 6-watt equivalent LED lights in the ceiling.  I w
/archives//html/RFI/2023-02/msg00030.html (11,828 bytes)

16. Re: [RFI] Noise Level During Power Outage (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Wed, 1 Feb 2023 14:16:28 -0800
Pete, How did you listen for noise? It's important to use a portable RX that you can move around wiring connected to a potential noise source. Several good receivers are listed in the link I posted y
/archives//html/RFI/2023-02/msg00031.html (8,859 bytes)

17. Re: [RFI] Noise Level During Power Outage (score: 1)
Author: K9MA <k9ma@sdellington.us>
Date: Wed, 1 Feb 2023 17:24:15 -0600
When I bought some LED fixtures for the kitchen a few years ago, I connected a power cord to them at home and tested them for RFI before installing them. All were OK. One of my neighbors unwittingly
/archives//html/RFI/2023-02/msg00033.html (12,610 bytes)

18. Re: [RFI] Noise Level During Power Outage (score: 1)
Author: David Eckhardt <davearea51a@gmail.com>
Date: Thu, 2 Feb 2023 00:03:53 +0000
In specifying this home and the lighting, we had some task ceiling lighting installed. I specified only "transformers" to power the lights as they operated on 12 vdc. You can guess what came next. Su
/archives//html/RFI/2023-02/msg00034.html (14,457 bytes)

19. Re: [RFI] Noise Level During Power Outage (score: 1)
Author: "Hare, Ed, W1RFI" <w1rfi@arrl.org>
Date: Thu, 2 Feb 2023 13:50:52 +0000
What was the model number of the offending device/supply? If a device does meet the FCC emissions limits, it is still likely that it will exhibit moderate interference when used in an amateur's own h
/archives//html/RFI/2023-02/msg00043.html (15,234 bytes)

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