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Total 48 documents matching your query.

1. Re: [RFI] There goes the neighborhood..... (score: 1)
Author: Gary Johnson <gwj@wb9jps.com>
Date: Mon, 27 May 2019 15:13:47 -0700
Funny that this topic should come up. Guess what got installed next door yesterday? A 6.5 kW SolarEdge system with optimizers. Complete wall-to-wall buzzing obliteration S9+10 on 40m (26 dB above my
/archives//html/RFI/2019-05/msg00036.html (9,493 bytes)

2. [RFI] NA6O RFI web page (score: 1)
Author: Gary Johnson <gwj@wb9jps.com>
Date: Tue, 4 Jun 2019 10:21:57 -0700
I have a fairly new RFI page, featuring a few of things that might be of interest. http://wb9jps.com/Gary_Johnson/RFI.html - A homebrew wideband LISN so that I can do pre-qualification FCC Part 15/18
/archives//html/RFI/2019-06/msg00029.html (7,037 bytes)

3. Re: [RFI] Portables for sniffing RFI (score: 1)
Author: Gary Johnson <gwj@wb9jps.com>
Date: Sat, 13 Jul 2019 10:20:29 -0700
I have a fairly tired, used, Realistic DX-398. Sensitivity is fine for noise sniffing. S meter is highly nonlinear but after testing it I know how to interpret it (you should check the one on the Tec
/archives//html/RFI/2019-07/msg00024.html (8,654 bytes)

4. Re: [RFI] RFI Digest, Vol 199, Issue 3 (score: 1)
Author: Gary Johnson <gwj@wb9jps.com>
Date: Fri, 2 Aug 2019 12:42:46 -0700
From the FCC site   https://www.fcc.gov/oet/ea/rfdevice -- INDUSTRIAL, SCIENTIFIC, AND MEDICAL EQUIPMENT (Part 18) When electronic-electrical products are used for providing RF energy for other than
/archives//html/RFI/2019-08/msg00003.html (8,109 bytes)

5. Re: [RFI] SolarEdge Solar Panel RFI Update (score: 1)
Author: Gary Johnson <gwj@wb9jps.com>
Date: Fri, 23 Aug 2019 14:18:38 -0700
Here is an update on my particular SolarEdge noise complaint. System with panel optimizers was installed in late May. The specific RFI that it produces is only at 200 kHz intervals due to control tel
/archives//html/RFI/2019-08/msg00052.html (9,814 bytes)

6. Re: [RFI] Name that Noise (score: 1)
Author: Gary Johnson <gwj@wb9jps.com>
Date: Fri, 20 Sep 2019 11:44:40 -0700
I think youll need to walk around with a DFing loop and try to triangulate the source. There is a design on my RFI pages that would work nicely with your KX2. http://wb9jps.com/Gary_Johnson/RFI_files
/archives//html/RFI/2019-09/msg00004.html (8,230 bytes)

7. Re: [RFI] Spectrum Cable Boxes (score: 1)
Author: Gary Johnson <gwj@wb9jps.com>
Date: Sun, 10 Nov 2019 20:10:33 -0800
That Jameco *is* a switcher. Note the small size and wide input voltage range. Linear adapters simply arent being offered new anymore. Gary NA6O _______________________________________________ RFI ma
/archives//html/RFI/2019-11/msg00028.html (7,491 bytes)

8. Re: [RFI] FCC Complaint Filing (score: 1)
Author: Gary Johnson <gwj@wb9jps.com>
Date: Thu, 21 Nov 2019 19:12:36 -0800
Been there, done that. See my presentation http://wb9jps.com/Gary_Johnson/RFI_files/Severe_RFI_NA6O.pdf and definitely call ARRL. They will give you all the correct advice and have a pipeline to the
/archives//html/RFI/2019-11/msg00046.html (7,287 bytes)

9. Re: [RFI] FCC Complaint Filing (score: 1)
Author: Gary Johnson <gwj@wb9jps.com>
Date: Fri, 22 Nov 2019 22:15:18 -0800
Brad, there is no reason for you to deal directly with the FCC. Waste no more time. Call Ed Hare on the phone. Get things squared away with the ARRL lab and they will start the formal complaint proce
/archives//html/RFI/2019-11/msg00078.html (8,573 bytes)

10. Re: [RFI] Light Dimmer (score: 1)
Author: Gary Johnson <gwj@wb9jps.com>
Date: Tue, 10 Dec 2019 15:58:02 -0800
I will do an FCC part 15 pre-qualification conducted emissions test next week on a new dimmer that I have on hand, a Lutron DVCL-153P. An quick informal test last year using my trusted DFing antenna
/archives//html/RFI/2019-12/msg00068.html (7,955 bytes)

11. Re: [RFI] Question: Conducted vs. Radiated Emissions (score: 1)
Author: Gary Johnson <gwj@wb9jps.com>
Date: Wed, 18 Dec 2019 08:08:23 -0800
Jim is once again spot-on about the huge procedural error regarding how conducted emissions are measured for consumer devices. The FCC Part 15 requires only a single-ended (hot to ground, neutral to
/archives//html/RFI/2019-12/msg00160.html (9,843 bytes)

12. [RFI] Lutron dimmer switch RFI report available (score: 1)
Author: Gary Johnson <gwj@wb9jps.com>
Date: Wed, 18 Dec 2019 13:40:34 -0800
Detailed measurements on a Lutron Diva dimmer switch, model DVCL-153P. Likely to interfere with the lowbands, especially 160m. But should be ok on the high bands. http://wb9jps.com/Gary_Johnson/RFI_f
/archives//html/RFI/2019-12/msg00173.html (6,583 bytes)

13. Re: [RFI] LED Lights (score: 1)
Author: Gary Johnson <gwj@wb9jps.com>
Date: Thu, 19 Dec 2019 20:04:47 -0800
Simple. Avoid fixtures. I have yet to find one that is acceptably quiet. Use medium-base screw-in bulbs, per the list at the bottom of my RFI page. http://wb9jps.com/Gary_Johnson/RFI.html Gary NA6O H
/archives//html/RFI/2019-12/msg00199.html (6,909 bytes)

14. Re: [RFI] LED Lights (score: 1)
Author: Gary Johnson <gwj@wb9jps.com>
Date: Fri, 20 Dec 2019 07:26:49 -0800
1. What make and model exactly. 2. How far are your antennas from those lights? I can also say with 100% confidence that a NOISY fixture will cause a proximal RFI problem even if only one is installe
/archives//html/RFI/2019-12/msg00201.html (8,704 bytes)

15. Re: [RFI] Tesla's Response to Solar Panel RFI (score: 1)
Author: Gary Johnson <gwj@wb9jps.com>
Date: Sun, 22 Dec 2019 17:32:28 -0800
TJ Simpson at Solar Edge tells me the new optimizers use spread spectrum modulation to reduce the 200 kHz interference that I am experiencing. In January, he is coming to install those next door. The
/archives//html/RFI/2019-12/msg00222.html (9,354 bytes)

16. Re: [RFI] Choke questions (score: 1)
Author: Gary Johnson <gwj@wb9jps.com>
Date: Wed, 22 Jan 2020 09:38:59 -0800
Harbour Industries RG400 is completely acceptable. I bought 100 ft on Ebay from a Chinese supplier. Measured it on my VNWA and extracted the cable parameters, which were actually slightly better than
/archives//html/RFI/2020-01/msg00123.html (8,395 bytes)

17. [RFI] SolarEdge Resolution (score: 1)
Author: Gary Johnson <gwj@wb9jps.com>
Date: Thu, 23 Jan 2020 14:44:59 -0800
TJ Simpson from SolarEdge was here with a crew that did their final phase of noise mitigation on the 6 kW system next door. Several months ago, they had re-routed all cabling to reduce loop areas and
/archives//html/RFI/2020-01/msg00131.html (9,171 bytes)

18. Re: [RFI] RFI Digest, Vol 205, Issue 26 (score: 1)
Author: Gary Johnson <gwj@wb9jps.com>
Date: Fri, 21 Feb 2020 11:09:25 -0800
Conducted emissions on the AC line side can be handled two ways. If youre using a Part 15 qualified AC adapter, you should be fine. Otherwise, you need a LISN and a spectrum analyzer to do a pre-qual
/archives//html/RFI/2020-02/msg00122.html (9,383 bytes)

19. Re: [RFI] RFI-free Vehicle 5v USB Adapter? (score: 1)
Author: Gary Johnson <gwj@wb9jps.com>
Date: Sun, 15 Mar 2020 10:39:32 -0700
Actually, KA7OEI is on the right track. Be prepared to be disappointed with regards to RFI from Chinese dc-dc converter modules. Extensive input and output filtering MUST be added if you want to elim
/archives//html/RFI/2020-03/msg00036.html (8,245 bytes)

20. [RFI] UPS with external batteries (score: 1)
Author: Gary Johnson <gwj@wb9jps.com>
Date: Wed, 1 Apr 2020 21:53:49 -0700
I'm looking for recommendations on a low-RFI UPS that supports external batteries for extended runtime. It does not have to provide a lot of power, a couple hundred Watts max would be sufficient. But
/archives//html/RFI/2020-04/msg00015.html (6,623 bytes)

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