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1. Re: [RFI] Twisted pair in conduit? (score: 1)
Author: David Eckhardt <davearea51a@gmail.com>
Date: Tue, 19 Dec 2017 00:51:00 +0000
I can relate a real happening in this respect. I volunteer at Little Thompson Observatory (<starkids.org>) on the grounds of Berthoud, Colorado HS. I was the last neutron that caused supercriticality
/archives//html/RFI/2017-12/msg00076.html (9,652 bytes)

2. Re: [RFI] Noise location tools (score: 1)
Author: David Eckhardt <davearea51a@gmail.com>
Date: Tue, 16 Jan 2018 20:03:22 +0000
The single most useful tool is a battery powered portable AM radio. It also helps if it has shortwave. The MFJ dish you refer to is an ultrasonic microphone given high directivity and sensitivity wit
/archives//html/RFI/2018-01/msg00022.html (8,009 bytes)

3. Re: [RFI] RFI Snapshot site is up... (score: 1)
Author: David Eckhardt <davearea51a@gmail.com>
Date: Fri, 19 Jan 2018 21:22:13 +0000
Ken, you should be aware of this site. It may be good in the future if enough of us support it. -- *Dave - WLEV* *Just Let Darwin Work* _______________________________________________ RFI mailing li
/archives//html/RFI/2018-01/msg00050.html (7,378 bytes)

4. Re: [RFI] RTTY signal on 3595.5 kHz (score: 1)
Author: David Eckhardt <davearea51a@gmail.com>
Date: Thu, 25 Jan 2018 21:36:09 +0000
I do not hear it here in N. Colorado (Loveland area). Dave - WLEV On Mon, Jan 22, 2018 at 5:38 PM, Kenneth G. Gordon <kgordon2006@frontier.com -- *Dave - WLEV* *Just Let Darwin Work* ______________
/archives//html/RFI/2018-01/msg00061.html (9,389 bytes)

5. Re: [RFI] New Dishwasher (score: 1)
Author: David Eckhardt <davearea51a@gmail.com>
Date: Fri, 26 Jan 2018 17:35:28 +0000
As previously mentioned, Bosch is good. We have one. Absolutely no problems. However, we have a top-end Maytag washer and dryer. They are awful with regards to RFI, fortunately, only when active a co
/archives//html/RFI/2018-01/msg00074.html (8,281 bytes)

6. Re: [RFI] Dishwasher (score: 1)
Author: David Eckhardt <davearea51a@gmail.com>
Date: Sat, 27 Jan 2018 19:24:18 +0000
We bought the 'industrial' Maytag brand washer and dryer. They both produce a lot of RFI on HF. However, wash only once or twice a week, but it does interfer with my HF radio astronomy ventures quite
/archives//html/RFI/2018-01/msg00101.html (12,062 bytes)

7. Re: [RFI] Dishwasher (score: 1)
Author: David Eckhardt <davearea51a@gmail.com>
Date: Sun, 28 Jan 2018 00:02:05 +0000
No, I did not contact Maytag. HOWEVER, when it came to the Panasonic PLASMA television, I did a complete set of measurements using good HP equipment, wrote a formal report, and sent it to Panasonic.
/archives//html/RFI/2018-01/msg00108.html (12,510 bytes)

8. Re: [RFI] Dishwasher (score: 1)
Author: David Eckhardt <davearea51a@gmail.com>
Date: Sun, 28 Jan 2018 20:35:25 +0000
I hear you, Jim. I guess I'm just tired of trying to do what is right wrt RFI/EMC. No one cares anymore. <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_c
/archives//html/RFI/2018-01/msg00115.html (15,513 bytes)

9. Re: [RFI] light bulbs (score: 1)
Author: David Eckhardt <davearea51a@gmail.com>
Date: Mon, 29 Jan 2018 19:33:48 +0000
It's good to see some activity on this group. We don't have anything other than 'scholarly' groups like IEEE and LinkedIn. Not much good for me in the trenches of solving real problems and telling su
/archives//html/RFI/2018-01/msg00126.html (7,423 bytes)

10. Re: [RFI] light bulbs (score: 1)
Author: David Eckhardt <davearea51a@gmail.com>
Date: Tue, 30 Jan 2018 00:42:31 +0000
I can certainly believe Peter: First Batch: Made in the US, Canada, or Mexico.......RFI clean Following batches: Made in China.......RFI dirty Dave - WLEV -- *Dave - WLEV* *Just Let Darwin Work* __
/archives//html/RFI/2018-01/msg00128.html (8,987 bytes)

11. Re: [RFI] RFI every 15 KHz on 160 meters, suspect source is a manufacturing facility. (score: 1)
Author: David Eckhardt <davearea51a@gmail.com>
Date: Sat, 3 Feb 2018 00:04:03 +0000
Having traveled similar tracks as Cortland (EMC/RFI Engineer), I can not stress the usefulness of the 3" loop. Just make one and use it. Take our word (writing) for its utility! Dave - WLEV EMC Desi
/archives//html/RFI/2018-02/msg00012.html (19,529 bytes)

12. Re: [RFI] Dishwasher RFI Video (score: 1)
Author: David Eckhardt <davearea51a@gmail.com>
Date: Sat, 3 Feb 2018 17:43:40 +0000
I'll jump in here as I'd recommend you spend a bit less than $200 and buy the AirSpy SDR. The reason is that the AirSpy can be used as a very capable spectrum analyzer that can cover roughly 20 MHz t
/archives//html/RFI/2018-02/msg00025.html (9,628 bytes)

13. Re: [RFI] RFI every 15 KHz on 160 meters, suspect source is a manufacturing facility. (score: 1)
Author: David Eckhardt <davearea51a@gmail.com>
Date: Sat, 3 Feb 2018 17:50:27 +0000
Look for AC/AC or AC/DC switching converters. I won't relate the story, but we had an incident where 208/3-phase was fed to several speed controllers on a large irrigation system (20-housepower AC mo
/archives//html/RFI/2018-02/msg00026.html (24,791 bytes)

14. Re: [RFI] Dishwasher RFI Video (score: 1)
Author: David Eckhardt <davearea51a@gmail.com>
Date: Sat, 3 Feb 2018 20:19:25 +0000
Yes, with the Spyverter, it will cover down to nearly DC. I use the Ham-it-Up to monitor 60 kHz WWVL and lightning research. That came out before the SpyVerter was available. With the Spyverter, you
/archives//html/RFI/2018-02/msg00028.html (11,217 bytes)

15. Re: [RFI] Dishwasher RFI Video (score: 1)
Author: David Eckhardt <davearea51a@gmail.com>
Date: Sun, 4 Feb 2018 17:55:23 +0000
The main AirSpy site is at: https://airspy.com/ All kinds of 'goodies'. Again, no connection other than a very satisfied user of the AirSpy products. Dave - WLEV On Sun, Feb 4, 2018 at 2:12 AM, Dave
/archives//html/RFI/2018-02/msg00031.html (12,418 bytes)

16. Re: [RFI] RFI every 15 KHz on 160 meters, suspect source is a manufacturing facility. (score: 1)
Author: David Eckhardt <davearea51a@gmail.com>
Date: Mon, 5 Feb 2018 17:15:07 +0000
The system I related to was at a distance of about 200-feet and detectable out to a mile+. It was definitely not in compliance for either FCC or CE, as claimed on the labels. Dave - WLEV -- *Dave -
/archives//html/RFI/2018-02/msg00034.html (27,353 bytes)

17. Re: [RFI] RFI every 15 KHz on 160 meters, suspect source is a manufacturing facility. (score: 1)
Author: David Eckhardt <davearea51a@gmail.com>
Date: Mon, 5 Feb 2018 22:19:22 +0000
Yes, tested as a system. Sure...... Yea....... You bet........ And how on God's green earth did any reputable and accredited lab responsibly test BPL? There are in-situ tests for regulatory purposes,
/archives//html/RFI/2018-02/msg00037.html (31,645 bytes)

18. Re: [RFI] Need Solar. Photo Voltaic System info (score: 1)
Author: David Eckhardt <davearea51a@gmail.com>
Date: Tue, 20 Feb 2018 18:38:39 +0000
I have heard from multiple sources that the 'optimizers' are filthy wrt RFI. -- *Dave - WLEV* *Just Let Darwin Work* _______________________________________________ RFI mailing list RFI@contesting.c
/archives//html/RFI/2018-02/msg00072.html (8,806 bytes)

19. Re: [RFI] Keyboard (score: 1)
Author: David Eckhardt <davearea51a@gmail.com>
Date: Sat, 3 Mar 2018 15:47:38 +0000
Most RFI prevention ferrite 'beads' are aimed at low VHF, at best, through 800 (a stretch) or so MHz. They will do little to nothing for HF RFI. Homeland Security recommends 61 material for EMP which
/archives//html/RFI/2018-03/msg00004.html (9,042 bytes)

20. Re: [RFI] Keyboard (score: 1)
Author: David Eckhardt <davearea51a@gmail.com>
Date: Sun, 4 Mar 2018 17:37:04 +0000
Having once had two SB220 Heathkit amps (one, I devoted to 160-meters only), coaxial cable is used for both the input and output. Further, the braid is connected to chassis at BOTH ends of all coax r
/archives//html/RFI/2018-03/msg00016.html (11,541 bytes)


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