Search String: Display: Description: Sort:

Results:

References: [ +from:nlsa@nlsa.com: 36 ]

Total 36 documents matching your query.

1. Re: [RFI] Grow Lights Coming to NJ - What can we do? (score: 1)
Author: <nlsa@nlsa.com>
Date: Fri, 5 Nov 2021 07:31:18 -0400
Dear friends, Wow, that's depressing. Could someone give a quick tutorial about what is generating the RFI? I don't know much about grow lights. Is the noise mostly SMPS, LEDs, fluorescent bulbs, or
/archives//html/RFI/2021-11/msg00005.html (16,554 bytes)

2. [RFI] RFI from geothermal furnace cathodic protection circuit (score: 1)
Author: <nlsa@nlsa.com>
Date: Wed, 17 Nov 2021 09:05:11 -0500
Dear friends, I am seeing RFI on 2m from the cathodic protection circuit in our geothermal heating system. The protective circuit's on-board SMPS generates a large broad emission around 150 MHz, veri
/archives//html/RFI/2021-11/msg00034.html (6,746 bytes)

3. Re: [RFI] RFI from geothermal furnace cathodic protection circuit (score: 1)
Author: <nlsa@nlsa.com>
Date: Wed, 17 Nov 2021 16:10:12 -0500
Dear Jim, I just installed some clip-ons (unknown ferrite mix) and they reduced the radiated emission by 30dB. I think that the last 10dB will take some more work. I'm curious what you mean by, "...
/archives//html/RFI/2021-11/msg00036.html (9,000 bytes)

4. [RFI] Strong RFI on 2m (score: 1)
Author: <nlsa@nlsa.com>
Date: Wed, 22 Dec 2021 09:50:23 -0500
Dear friends, I have recently commissioned my 4-yagi 2m EME system. To my unhappy surprise, I find strong RFI in the direction of a large commercial broadcast tower 3.5 miles away. The noise is unifo
/archives//html/RFI/2021-12/msg00081.html (7,311 bytes)

5. Re: [RFI] Strong RFI on 2m (score: 1)
Author: <nlsa@nlsa.com>
Date: Wed, 22 Dec 2021 16:27:48 -0500
Dear Lloyd & others, I appreciate the several replies on and off-list. After building my EME system from scratch over the past seven years, I would prefer that the noise problem be something I can so
/archives//html/RFI/2021-12/msg00090.html (12,627 bytes)

6. Re: [RFI] Strong RFI on 2m (score: 1)
Author: <nlsa@nlsa.com>
Date: Wed, 22 Dec 2021 16:46:06 -0500
My question should be, "What does Ethernet EMI look like at VHF?" It might be different at HF. W9IP Dear Lloyd & others, I appreciate the several replies on and off-list. After building my EME system
/archives//html/RFI/2021-12/msg00091.html (14,101 bytes)

7. [RFI] 500W outdoor halogen spotlight replacement (score: 1)
Author: <nlsa@nlsa.com>
Date: Tue, 8 Feb 2022 19:47:01 -0500
Dear friends, I would appreciate recommendations for LED replacements for a couple of 500W halogen spotlights. They illuminate my 2m EME antenna and of course they must be RFI-quiet. Thanks W9IP ____
/archives//html/RFI/2022-02/msg00037.html (6,464 bytes)

8. Re: [RFI] RFI from variable speed drive 1.1 miles away (very interesting case). (score: 1)
Author: <nlsa@nlsa.com>
Date: Thu, 17 Nov 2022 07:50:07 -0500
Dear Don - Could you post an image of what the interference looked like in the frequency domain? 73, W9IP Today I tracked down new RFI at my QTH on 160 meters. I was able to hear the RFI from my driv
/archives//html/RFI/2022-11/msg00014.html (9,364 bytes)

9. Re: [RFI] RFI from variable speed drive 1.1 miles away (very interesting case). (score: 1)
Author: <nlsa@nlsa.com>
Date: Thu, 17 Nov 2022 08:50:03 -0500
Don Silly me, I didnt read all the way to the end of your post; didnt see the video link. Sorry. W9IP From: Don Kirk <wd8dsb@gmail.com> Sent: Thursday, November 17, 2022 8:35 AM To: nlsa@nlsa.com Cc:
/archives//html/RFI/2022-11/msg00016.html (11,883 bytes)

10. [RFI] VHF DSSS? (score: 1)
Author: <nlsa@nlsa.com>
Date: Thu, 17 Nov 2022 10:15:32 -0500
Dear friends, A new source of interference popped up a few days ago. Its center frequency appears to be 143.950 MHz with sidebands every 200 kHz up and down the spectrum. It is intermittent but when
/archives//html/RFI/2022-11/msg00017.html (7,141 bytes)

11. Re: [RFI] VHF DSSS? (score: 1)
Author: <nlsa@nlsa.com>
Date: Thu, 17 Nov 2022 11:18:09 -0500
I keep forgetting that attached images aren't permitted. Here it is: https://www.nlsa.com/images/W9IP%20interference.jpg W9IP Dear friends, A new source of interference popped up a few days ago. Its
/archives//html/RFI/2022-11/msg00019.html (7,669 bytes)

12. [RFI] RFI when solar array is switched off? (score: 1)
Author: <nlsa@nlsa.com>
Date: Tue, 3 Jan 2023 12:19:15 -0500
Dear friends, I have a question about the "off" state of PV arrays. If a solar array generates RFI when it is on, does it stop when the array is turned off? I suppose that the answer depends on sever
/archives//html/RFI/2023-01/msg00008.html (6,990 bytes)

13. Re: [RFI] RFI when solar array is switched off? (score: 1)
Author: <nlsa@nlsa.com>
Date: Tue, 3 Jan 2023 23:21:01 -0500
Dear Tony - Thank you for the pointer to your excellent videos. Regarding the optimizers... are they shut-down-able or do they always operate if the solar panels are illuminated? 73, W9IP Mike: I hav
/archives//html/RFI/2023-01/msg00021.html (11,000 bytes)

14. Re: [RFI] RFI when solar array is switched off? (score: 1)
Author: <nlsa@nlsa.com>
Date: Tue, 3 Jan 2023 23:34:32 -0500
Dear Michael, Thank you for your clear and specific reply to my question. I will investigate whether residual RFI continues when microinverters are shut down. Best regards, Michael, W9IP From: Michae
/archives//html/RFI/2023-01/msg00023.html (13,652 bytes)

15. [RFI] Noise puzzler (score: 1)
Author: <nlsa@nlsa.com>
Date: Tue, 10 Jan 2023 13:50:53 -0500
Dear friends, I have noticed something that puzzles me. When I turn ON a pair of AC fans, my VHF noise floor *drops.* Background: My EME station is remotely operated. Everything is mounted at the ant
/archives//html/RFI/2023-01/msg00058.html (8,471 bytes)

16. Re: [RFI] Noise puzzler (score: 1)
Author: <nlsa@nlsa.com>
Date: Tue, 10 Jan 2023 17:44:21 -0500
Dear friends, A couple of members have replied off-list, both suggesting that the AC wiring or perhaps an imperfect ground connection might cause the odd noise behavior. The latter is a definite poss
/archives//html/RFI/2023-01/msg00061.html (10,528 bytes)

17. [RFI] SolarEdge's "improved" system? (score: 1)
Author: <nlsa@nlsa.com>
Date: Tue, 7 Feb 2023 14:34:11 -0500
Dear friends, Several people have mentioned on this reflector that SolarEdge was working on improvements to their equipment that would reduce RFI emissions. Does anyone have specific models or other
/archives//html/RFI/2023-02/msg00049.html (6,559 bytes)

18. Re: [RFI] k SolarEdge's "improved" system? (score: 1)
Author: <nlsa@nlsa.com>
Date: Wed, 8 Feb 2023 07:02:22 -0500
Kurt - You may be correct but we'll never know unless someone inside SolarEdge speaks out. Don't overlook the economic aspect. A solution to RFI might exist but it's more costly than SolarEdge wants
/archives//html/RFI/2023-02/msg00052.html (10,145 bytes)

19. [RFI] Netgear GS724T switch (score: 1)
Author: <nlsa@nlsa.com>
Date: Wed, 21 Jun 2023 20:08:45 -0400
Dear friends, My remote 2m EME system is comprised of a number of modules (SDR, transverter, SSPA, plus antenna and ventilation control modules, etc.), all of which are linked to each other via a Net
/archives//html/RFI/2023-06/msg00032.html (6,946 bytes)

20. Re: [RFI] Netgear GS724T switch (score: 1)
Author: <nlsa@nlsa.com>
Date: Thu, 22 Jun 2023 07:26:43 -0400
Dear Jim - Thank you for your comments and suggestions. I neglected to mention in my original post that I had also replaced the Netgear switch's plastic AC power entry connector with a shielded and f
/archives//html/RFI/2023-06/msg00035.html (9,645 bytes)


This search system is powered by Namazu