- 1. [RFI] Astron fan circuit noise (score: 1)
- Author: "John Rader" <k5xtx@hotmail.com>
- Date: Thu, 14 Oct 2004 20:49:36 -0500
- My Astron SS-30M makes noise on 80m each time the fan starts. The noise starts out low in pitch and increases for about 10 seconds then stops. The fan continues to run for about 30 more seconds. It i
- /archives//html/RFI/2004-10/msg00032.html (6,794 bytes)
- 2. Re: [RFI] Astron fan circuit noise (score: 1)
- Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>
- Date: Fri, 15 Oct 2004 08:38:42 +0100
- John Rader wrote: My Astron SS-30M makes noise on 80m each time the fan starts. The noise starts out low in pitch and increases for about 10 seconds then stops. The fan continues to run for about 30
- /archives//html/RFI/2004-10/msg00033.html (7,551 bytes)
- 3. Re: [RFI] Astron fan circuit noise (score: 1)
- Author: <dgsvetan@rockwellcollins.com>
- Date: Fri, 15 Oct 2004 09:01:07 -0500
- John, I have had a SS-30M for over a year and have not experienced the problem on 80m, or any other HF or VHF/UHF band, to date. Being an EMC engineer, I could not resist opening up the unit after ch
- /archives//html/RFI/2004-10/msg00034.html (10,607 bytes)
- 4. RE: [RFI] Astron fan circuit noise (score: 1)
- Author: "Cortland Richmond" <ka5s@earthlink.net>
- Date: Fri, 15 Oct 2004 07:59:01 -0700
- I agree with Dale. (We're in the same line of work.) I've heard EMI from DC brushless fans before. Usually, not enough to be a problem, but quite similar to what you've noted. Probably, some fans hav
- /archives//html/RFI/2004-10/msg00035.html (7,669 bytes)
- 5. Re: [RFI] Astron fan circuit noise (score: 1)
- Author: "John Rader" <k5xtx@hotmail.com>
- Date: Fri, 15 Oct 2004 23:04:16 -0500
- Thanks for the suggestions. I need to take a look inside to see if the fan leads are properly routed or wound on toroids. I'll post the resolution to this. Thanks, John K5XTX ________________________
- /archives//html/RFI/2004-10/msg00040.html (7,310 bytes)
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