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1. [RFI] Noise emitted by rotator (score: 1): Author: Pete Smith N4ZR <n4zr@contesting.com>; Date: Sat, 04 Aug 2012 21:32:48 -0400; I've started noticing that on 10 meters my top Yaesu G-1000 rotator has begun to emit broadband white noise when the antenna is actually turning. Any ideas what the cause could be? 73, Pete N4ZR The; /archives//html/RFI/2012-08/msg00013.html (7,209 bytes)
2. Re: [RFI] Noise emitted by rotator (score: 1): Author: "qrv@kd4e.com" <qrv@kd4e.com>; Date: Sat, 04 Aug 2012 21:44:33 -0400; Could it be the wiper in the position-pot? Like a light dimmer in the house when the surface gets dirty or worn. -- Thanks! & 73, KD4E.com David Colburn nevils-station.com I don't google I SEARCH! du; /archives//html/RFI/2012-08/msg00014.html (7,130 bytes)
3. Re: [RFI] Noise emitted by rotator (score: 1): Author: "Bob Turner" <Bob@n2scj.net>; Date: Sat, 4 Aug 2012 22:39:45 -0400; Mine too. I hear noise on V/UHF. It seems to be worse when I don't use it. The more I use it the quieter it gets. Its been this way ~3 years now. Bob http://n2scj.net I've started noticing that on 10; /archives//html/RFI/2012-08/msg00015.html (7,642 bytes)
4. [RFI] Noise emitted by rotator (score: 1): Author: <emoss98133@msn.com>; Date: Sat, 4 Aug 2012 20:46:59 -0700; My Yaesu G-800S does it also , only in one direction. (CW) right _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi; /archives//html/RFI/2012-08/msg00016.html (6,563 bytes)
5. Re: [RFI] Noise emitted by rotator (score: 1): Author: "KD7JYK DM09" <kd7jyk@earthlink.net>; Date: Sat, 4 Aug 2012 22:07:58 -0700; I would guess that it's white noise generated by arcing due to metallic/carbon debris on the motors rotor contacts. I've noticed this with two DC motors over the years. Kurt ________________________; /archives//html/RFI/2012-08/msg00017.html (7,426 bytes)
6. Re: [RFI] Noise emitted by rotator (score: 1): Author: "K1TTT" <K1TTT@ARRL.NET>; Date: Sun, 05 Aug 2012 10:35:30 +0000; There are 2 things to consider in this... in that rotor the motor is actually isolated from ground, and it contains a filter circuit consisting of chokes and capacitors. One of the first odd things I; /archives//html/RFI/2012-08/msg00018.html (9,529 bytes)
7. Re: [RFI] Noise emitted by rotator (score: 1): Author: Pete Smith N4ZR <n4zr@contesting.com>; Date: Sun, 05 Aug 2012 06:58:38 -0400; Thanks to everyone for their ideas on this. I had come to pretty much the same conclusion as Dave about the filter, maybe with some support as well for the idea that the brushes in the motor are wear; /archives//html/RFI/2012-08/msg00019.html (11,127 bytes)
8. Re: [RFI] Noise emitted by rotator (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Sun, 5 Aug 2012 09:54:57 -0400 (GMT-04:00); Pete and All, I have a G-1000 and can tell you that since it has a speed control, the output of the control unit is PWM (pulse width modulated). I have never heard QRN from the rotor or control unit,; /archives//html/RFI/2012-08/msg00020.html (13,085 bytes)
9. Re: [RFI] Noise emitted by rotator (score: 1): Author: "K1TTT" <K1TTT@ARRL.NET>; Date: Sun, 05 Aug 2012 15:13:20 +0000; No pwm in there, just simple dc voltage control... it even has a 330uf filter cap just before the direction switching relay. David Robbins K1TTT e-mail: mailto:k1ttt@arrl.net web: http://wiki.k1ttt.n; /archives//html/RFI/2012-08/msg00021.html (13,913 bytes)
10. Re: [RFI] Noise emitted by rotator (score: 1): Author: "Bob Turner" <Bob@n2scj.net>; Date: Sun, 5 Aug 2012 12:23:16 -0400; Any ideas how to filter the noise without opening up the rotor? In other words, rotor stays in tower. My G-1000 is in a roof tower. I can walk next to it quite easily. It's a major undertaking removi; /archives//html/RFI/2012-08/msg00022.html (15,025 bytes)
11. Re: [RFI] Noise emitted by rotator (score: 1): Author: "K1TTT" <K1TTT@ARRL.NET>; Date: Sun, 05 Aug 2012 17:03:02 +0000; I would try small ceramic filter caps at the rotor connector. Just on the power leads at first, then maybe to the shell ground to see what combination stops the noise from getting out. David Robbins; /archives//html/RFI/2012-08/msg00023.html (16,358 bytes)
12. Re: [RFI] Noise emitted by rotator (score: 1): Author: "AE4CW" <ae4cw@att.net>; Date: Sun, 5 Aug 2012 13:53:15 -0400; I have a Yaesu G-800SA to which I added a Microsystems Design RC1-Y control. This control does use PWM and does generate hash on most bands from 160-6M. 3-5 turns of both the rotor cable and the comp; /archives//html/RFI/2012-08/msg00024.html (34,023 bytes)

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