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Total 28 documents matching your query.

21. Re: [RFI] Hum in Bose QC2 headphones (score: 1): Author: Robert W9RFS <w9rfs@arrl.net>; Date: Wed, 14 Jan 2009 14:01:24 -0800 (PST); Gary, Have you replaced the batteries in the headsets? Bob W9RFS _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi; /archives//html/RFI/2009-01/msg00113.html (9,687 bytes)
22. Re: [RFI] Hum in Bose QC2 headphones (score: 1): Author: Ron Rossi <kk1l@arrl.net>; Date: Thu, 15 Jan 2009 09:17:58 -0500; Is it worth checking to see of there are any two prong plugs on the 120V circuit and plugging them in 180 the other way (including wall warts)?? 73 es God Bless de KK1L...Ron Rossi (kk1l@arrl.net) <>; /archives//html/RFI/2009-01/msg00114.html (12,176 bytes)
23. Re: [RFI] Hum in Bose QC2 headphones (score: 1): Author: "Gary Smith" <Gary@doctorgary.net>; Date: Thu, 15 Jan 2009 10:00:14 -0500; Ron, I hadn't thought to do that but it is worth while & I'll check that out. It would have to be a wall wart in that everything else here is three prong. Interesting that while running my laptop plu; /archives//html/RFI/2009-01/msg00115.html (14,791 bytes)
24. Re: [RFI] Hum in Bose QC2 headphones (score: 1): Author: "Tim Duffy K3LR" <k3lr@k3lr.com>; Date: Thu, 15 Jan 2009 10:33:56 -0600; I wonder if there is a problem with your AC house/shack wiring? Missing ground at the breaker panel or a connection between the ground wire and neutral missing or miss wired? It might be worth trying; /archives//html/RFI/2009-01/msg00116.html (15,824 bytes)
25. Re: [RFI] Hum in Bose QC2 headphones (score: 1): Author: "Gary Smith" <Gary@doctorgary.net>; Date: Thu, 15 Jan 2009 12:04:20 -0500; Tim, Anything is possible. I am going to my girlfriend's place this weekend and have an antenna there as well albiet only for 40 - 20M. But... if the problem is present I won't need to have the anten; /archives//html/RFI/2009-01/msg00118.html (18,605 bytes)
26. Re: [RFI] Hum in Bose QC2 headphones (score: 1): Author: "David Jordan" <wa3gin@comcast.net>; Date: Thu, 15 Jan 2009 12:35:21 -0500; Check to see if the input impedance between the two channels is different. You may just have an 'open' signal ground on the effected channel. That could be a cold solder joint on the active circuit b; /archives//html/RFI/2009-01/msg00119.html (19,174 bytes)
27. Re: [RFI] Hum in Bose QC2 headphones (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Thu, 15 Jan 2009 10:31:16 -0800; As I observed much earlier in the thread, this problem has the symptoms of magnetic field coupling because Gary has described it as pure 60 Hz hum, NOT BUZZ. If power system wiring is correct, the ma; /archives//html/RFI/2009-01/msg00120.html (10,691 bytes)
28. Re: [RFI] Hum in Bose QC2 headphones (score: 1): Author: "Gary Smith" <Gary@doctorgary.net>; Date: Thu, 15 Jan 2009 15:53:29 -0500; Just measured that & 354 ohms tip to ground and the same for ring to ground. Seems like this is a problem for repair and they have a flat fee when out of warranty... $100 & they send you a new pair i; /archives//html/RFI/2009-01/msg00121.html (21,555 bytes)

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