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Total 66 documents matching your query.

1. Re: [RFI] Help with Bad RFI. (score: 1)
Author: Tom Thompson <tlthompson@qwest.net>
Date: Sat, 15 Jan 2011 08:50:02 -0700
Rick, The noise schedule of 12 hours on and 12 hours off may be ballast noise from a grow light. I have had several of these in my neighborhood. The on/off schedule is consistent with the growing sch
/archives//html/RFI/2011-01/msg00141.html (9,899 bytes)

2. Re: [RFI] Help with Bad RFI. (score: 1)
Author: Tom Thompson <tlthompson@qwest.net>
Date: Sat, 15 Jan 2011 15:59:22 -0700
Jim, Getting access to the ballast has been problematic, but I constructed a noise source using a single MOSFET switching at 75 kHz. This generated plenty of noise in the 40 meter band where I was ha
/archives//html/RFI/2011-01/msg00145.html (11,538 bytes)

3. [RFI] DFing (score: 1)
Author: Tom Thompson <tlthompson@qwest.net>
Date: Wed, 04 May 2011 08:43:02 -0600
Here is a link to a Picasa site showing some pictures of some inexpensive noise finding tools. http://picasaweb.google.com/990toedtli/NoiseFindingTools# The loop using the plastic tubing labeled Tune
/archives//html/RFI/2011-05/msg00029.html (8,930 bytes)

4. [RFI] 17 meter signal (score: 1)
Author: Tom Thompson <tlthompson@qwest.net>
Date: Tue, 19 Jul 2011 14:33:56 -0600
I am in Colorado and have noticed a station on 18.0855 sending a series of dits. It seems to be propagating due to the fading. It has been on for about two weeks. My antenna says it is coming from th
/archives//html/RFI/2011-07/msg00016.html (6,323 bytes)

5. Re: [RFI] 17 meter signal (score: 1)
Author: Tom Thompson <tlthompson@qwest.net>
Date: Tue, 19 Jul 2011 16:39:37 -0600
Bud, I don't hear it now either. It may have gone off the air or it might be propagation. Tom W0IVJ _______________________________________________ RFI mailing list RFI@contesting.com http://lists.co
/archives//html/RFI/2011-07/msg00018.html (7,202 bytes)

6. Re: [RFI] 17 meter signal (score: 1)
Author: Tom Thompson <tlthompson@qwest.net>
Date: Wed, 20 Jul 2011 11:25:28 -0600
I just received this note from W9CAR: Hello everyone, We have a successful conclusion to this situation to report to you. We received word from Laura Smith at the FCC last night at 2330 UTC that the
/archives//html/RFI/2011-07/msg00022.html (9,323 bytes)

7. Re: [RFI] 2.4" OD #31 toroids (score: 1)
Author: Tom Thompson <tlthompson@qwest.net>
Date: Mon, 30 Jan 2012 07:27:51 -0700
Pete, Mouser part number 623-2631803802 They have over 4000 in stock at $7.00 Tom W0IVJ _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com
/archives//html/RFI/2012-01/msg00123.html (7,943 bytes)

8. Re: [RFI] Single-point grounding (score: 1)
Author: Tom Thompson <tlthompson@qwest.net>
Date: Sun, 01 Jul 2012 10:44:44 -0600
There is a 3 part series on the ARRL web site about lightening protection. http://www.arrl.org/lightning-protection Tom W0IVJ _______________________________________________ RFI mailing list RFI@cont
/archives//html/RFI/2012-07/msg00004.html (9,527 bytes)

9. Re: [RFI] MFJ-856 oddity (score: 1)
Author: Tom Thompson <tlthompson@qwest.net>
Date: Mon, 06 Aug 2012 07:19:57 -0600
Paul, You might try a common mode choke on the coax. Tom W0IVJ _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi
/archives//html/RFI/2012-08/msg00027.html (8,178 bytes)

10. Re: [RFI] Samsung refrigerator RFI (score: 1)
Author: Tom Thompson <tlthompson@qwest.net>
Date: Wed, 08 Aug 2012 17:53:54 -0600
I would, at the very least, file a report with the FCC. This device is most likely not compliant with the conducted emissions requirements. Fixing these devices one at a time is getting really old. I
/archives//html/RFI/2012-08/msg00040.html (8,537 bytes)

11. Re: [RFI] Samsung refrigerator RFI (score: 1)
Author: Tom Thompson <tlthompson@qwest.net>
Date: Wed, 08 Aug 2012 18:20:42 -0600
Hi Kelly, My approach has been that I might help them fix the problem since they are broadcasting their grow. I was able to talk one grower into letting me borrow his light and ballast during the day
/archives//html/RFI/2012-08/msg00041.html (12,427 bytes)

12. Re: [RFI] Samsung refrigerator RFI (score: 1)
Author: Tom Thompson <tlthompson@qwest.net>
Date: Wed, 08 Aug 2012 19:21:41 -0600
Not completely. See below... Emissions - USA In the USA, the FCC exempts from its technical regulations appliances that contain incidental radiators such as switches and motors. Only appliances conta
/archives//html/RFI/2012-08/msg00044.html (13,610 bytes)

13. Re: [RFI] Getting a Gas Furnace, and Electric AC unit... (score: 1)
Author: Tom Thompson <tlthompson@qwest.net>
Date: Tue, 14 Aug 2012 07:10:16 -0600
Jim, AMEN, AMEN, and AMEN. Tom W0IVJ _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi
/archives//html/RFI/2012-08/msg00073.html (9,972 bytes)

14. Re: [RFI] RFI to new photoelectric smoke detector (score: 1)
Author: Tom Thompson <tlthompson@qwest.net>
Date: Tue, 06 Nov 2012 09:47:44 -0700
I had the same problem with several CO detectors. I finally found a brand that did not have the problem from Kidde. The model number is KN-COB-B but it is a CO detector not a smoke detector. Tom W0IV
/archives//html/RFI/2012-11/msg00021.html (8,969 bytes)

15. [RFI] test (score: 1)
Author: Tom Thompson <tlthompson@qwest.net>
Date: Tue, 15 Jan 2013 08:43:36 -0700
_______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi
/archives//html/RFI/2013-01/msg00076.html (6,084 bytes)

16. Re: [RFI] URGENT: Washing Machine RFI (score: 1)
Author: Tom Thompson <tlthompson@qwest.net>
Date: Sun, 24 Feb 2013 14:22:30 -0700
Speed Queen makes a traditional washer with a transmission instead of an electronic controlled motor. Tom W0IVJ See my YouTube video to see for yourself how bad it is... https://www.youtube.com/watch
/archives//html/RFI/2013-02/msg00015.html (8,016 bytes)

17. Re: [RFI] Nineteen Hour Noise (score: 1)
Author: tlthompson <tlthompson@qwest.net>
Date: Fri, 08 Mar 2013 15:00:52 -0700
Ron, I have tracked down several grow light noise sources in my neighborhood that fit your description exactly. The noise in my case was generated by 1 kW ballasts used with high pressure sodium lamp
/archives//html/RFI/2013-03/msg00029.html (9,658 bytes)

18. Re: [RFI] Inexpensive line filtering options was Re: Nineteen Hour Noise (score: 1)
Author: tlthompson <tlthompson@qwest.net>
Date: Sat, 09 Mar 2013 08:48:08 -0700
Hi Pete, Thanks for the comments on the web site but the credit must go to Larry, W0QE for that. I have had the grow light interference, Larry and I worked together on the filters, but he did all the
/archives//html/RFI/2013-03/msg00033.html (14,672 bytes)

19. Re: [RFI] Nineteen Hour Noise (score: 1)
Author: tlthompson <tlthompson@qwest.net>
Date: Sun, 10 Mar 2013 16:20:53 -0600
Ron, I am not sure, but I think the reason the noise is worse on 40 m is that the line from the ballast to the lamp is about 30 feet (almost 1/4 wave length on 40 m). At least that is the way it has
/archives//html/RFI/2013-03/msg00041.html (8,468 bytes)

20. Re: [RFI] Nineteen Hour Noise (score: 1)
Author: Tom Thompson <tlthompson@qwest.net>
Date: Wed, 13 Mar 2013 19:53:00 -0600
Ron, I know more about marijuana growing than I ever wanted to. I Googled so much that I get personalized ads about it. One grower would not let me in his house to install filters (I had to build the
/archives//html/RFI/2013-03/msg00069.html (9,327 bytes)

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