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Total 7 documents matching your query.

1. [RFI] Rectified 120Hz RFI? (score: 1): Author: Kelly Johnson <n6kj.kelly@gmail.com>; Date: Wed, 4 Aug 2010 08:16:59 -0700; I am hearing a new RFI source at my home. It's different than the other sources. The other 2 sources of noise are definitely powerline poles: one in a neighbor's hard 2 doors down and the other in my; /archives//html/RFI/2010-08/msg00009.html (7,829 bytes)
2. Re: [RFI] Rectified 120Hz RFI? (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Wed, 04 Aug 2010 08:40:03 -0700; Could be an arc on both the positive and negative excursions. 73, Jim K9YC _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/list; /archives//html/RFI/2010-08/msg00010.html (6,652 bytes)
3. Re: [RFI] Rectified 120Hz RFI? (score: 1): Author: Kelly Johnson <n6kj.kelly@gmail.com>; Date: Wed, 4 Aug 2010 09:24:48 -0700; I did a little more DFing this morning. I think I was finally able to hear it with my portable radio and 2m yagi. It appears to come from a neighbor's garage. I'm thinking battery charger or somethin; /archives//html/RFI/2010-08/msg00011.html (7,858 bytes)
4. Re: [RFI] Rectified 120Hz RFI? (score: 1): Author: Andy <ingraham.ma.ultranet@rcn.com>; Date: Wed, 4 Aug 2010 13:45:48 -0400; Just thinking, there are many possibilities for what might cause it to be 120 Hz instead of 60 Hz. One being something gone wrong in a full wave rectifier. Jim's suggestion of arcing on both excursio; /archives//html/RFI/2010-08/msg00012.html (7,131 bytes)
5. Re: [RFI] Rectified 120Hz RFI? (score: 1): Author: Kelly Johnson <n6kj.kelly@gmail.com>; Date: Wed, 4 Aug 2010 11:12:37 -0700; Triacs? Are we talking the things found in dimmer switches? _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi; /archives//html/RFI/2010-08/msg00013.html (8,387 bytes)
6. Re: [RFI] Rectified 120Hz RFI? (score: 1): Author: Andy <ingraham.ma.ultranet@rcn.com>; Date: Wed, 4 Aug 2010 14:43:02 -0400; Yes. Used for things other than dimmers too. _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi; /archives//html/RFI/2010-08/msg00014.html (7,248 bytes)
7. Re: [RFI] Rectified 120Hz RFI? (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Wed, 6 Oct 2010 21:55:07 -0400; Jim is right; that's exactly what happens most of the time with power line noise. Rarely, the arcing can be assymetical on positive and negative peaks, usually when there is some corona involved. No; /archives//html/RFI/2010-10/msg00002.html (12,241 bytes)

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