Search String: Display: Description: Sort:

Results:

References: [ +from:dougp01@gmail.com: 12 ]

Total 12 documents matching your query.

1. Re: [RFI] Noise on 15 (score: 1)
Author: dougp01 <dougp01@gmail.com>
Date: Wed, 29 Apr 2015 11:43:06 -0600
Larry, Any chance you recorded the audio portion? Stuff like rep rate and envelop matter.  I used to work in military electronic warfare and was trained in recognition of RADAR.    Thanks, Doug Thank
/archives//html/RFI/2015-04/msg00014.html (7,753 bytes)

2. Re: [RFI] Noise on 15 (score: 1)
Author: dougp01 <dougp01@gmail.com>
Date: Wed, 29 Apr 2015 11:44:21 -0600
Although I have to say, that band is extremely low for RADAR.   Doug   Original Message   Larry, Any chance you recorded the audio portion? Stuff like rep rate and envelop matter.  I used to work in
/archives//html/RFI/2015-04/msg00015.html (7,639 bytes)

3. Re: [RFI] Compass Vectors (score: 1)
Author: Doug Powell <dougp01@gmail.com>
Date: Mon, 30 Nov 2015 19:42:12 -0700
You could try using Sketchup, it allows you to geolocate many things in your drawing.   Doug Douglas E Powell I'm planning on doing some RFI hunting and wanted to know if anyone knows how to plot com
/archives//html/RFI/2015-11/msg00028.html (7,199 bytes)

4. Re: [RFI] treadmill noise (score: 1)
Author: Doug Powell <dougp01@gmail.com>
Date: Fri, 26 Feb 2016 11:45:38 -0700
David  This is a very low frequency for an EMI filter, most of those are useful down to the low 100s of kHz. You may have to look into some sort of a low pass line filter, or look into making one of
/archives//html/RFI/2016-02/msg00130.html (8,744 bytes)

5. Re: [RFI] treadmill noise (score: 1)
Author: Doug Powell <dougp01@gmail.com>
Date: Fri, 26 Feb 2016 11:48:52 -0700
I should mention that these treadmills came up on another forum as the culprit for nuisance tripping of GFI circuit breakers with arc fault detection. The treadmill is generally an unregulated device
/archives//html/RFI/2016-02/msg00131.html (8,906 bytes)

6. Re: [RFI] DC Power supplies (score: 1)
Author: Doug Powell <dougp01@gmail.com>
Date: Wed, 4 May 2016 13:34:21 -0600
Charlie, I have worked in regulatory product compliance for many years and the information you seek is not readily available on most manufacturer's data sheets. As you probably already know, having a
/archives//html/RFI/2016-05/msg00016.html (10,794 bytes)

7. Re: [RFI] DC Power supplies (score: 1)
Author: Doug Powell <dougp01@gmail.com>
Date: Wed, 04 May 2016 15:59:24 -0600
There is no such thing as a "noise free" switcher, only unaffected equipment.   The quietest switching power supplies tend to be medical grade.   You don't want RFI affecting life support equipment.
/archives//html/RFI/2016-05/msg00020.html (10,962 bytes)

8. Re: [RFI] DC Power supplies (score: 1)
Author: Doug Powell <dougp01@gmail.com>
Date: Wed, 4 May 2016 17:07:52 -0600
You are absolutely correct. Although it is not possible to be dead quiet, with enough filtering, shielding, and RF absorbers it is possible to reduce your RF signature to extremely low levels. I have
/archives//html/RFI/2016-05/msg00022.html (14,135 bytes)

9. Re: [RFI] ebay line filters (score: 1)
Author: Doug Powell <dougp01@gmail.com>
Date: Mon, 15 Aug 2016 07:49:10 -0600
One thing you should realize about line filters is they are optimized for conducted line emissions coming from the product where they are built in. This means the line / load labeling  will determine
/archives//html/RFI/2016-08/msg00114.html (9,384 bytes)

10. Re: [RFI] ebay line filters (score: 1)
Author: Doug Powell <dougp01@gmail.com>
Date: Mon, 15 Aug 2016 17:26:28 -0600
Good points, It is indeed true that common mode noise is with reference to the green wire ground, but back at the measurement point and not the case of the filter. In the case if Mil Std filters this
/archives//html/RFI/2016-08/msg00117.html (9,590 bytes)

11. Re: [RFI] ebay line filters (score: 1)
Author: Doug Powell <dougp01@gmail.com>
Date: Mon, 15 Aug 2016 22:18:04 -0600
You made my points. In the end a commercial equipment manufacturers can only design and test to a standardized test setup. This is exactly what's described in CISPR 11, CISPR 22, ANSI/IEEE C63 and na
/archives//html/RFI/2016-08/msg00120.html (14,096 bytes)

12. Re: [RFI] ebay line filters (score: 1)
Author: Doug Powell <dougp01@gmail.com>
Date: Mon, 15 Aug 2016 22:31:41 -0600
Line filters are primarily constructed of components that are simple inductors and capacitors. The main difference in the inductors is the core material is a low Q or lossy ferrite at certain frequen
/archives//html/RFI/2016-08/msg00123.html (10,046 bytes)

Current List: 1 - 12
Page: [1]
This search system is powered by Namazu