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Re: [RFI] Mystery noise

To: Christopher Wawak <kc2ieb@wawak.org>
Subject: Re: [RFI] Mystery noise
From: David Eckhardt <davearea51a@gmail.com>
Date: Fri, 13 Aug 2021 18:54:38 +0000
List-post: <mailto:rfi@contesting.com>
Christopher, don't laugh at that proposal.  I once worked with a couple of
retired engineers from Los Alamos.  They actually proposed such a
communication mode.

Why did you 'say too much'.  You've got my attention!!

Dave - WØLEV

On Fri, Aug 13, 2021 at 6:36 PM Christopher Wawak <kc2ieb@wawak.org> wrote:

> What if ET is trying to call you through the RFI? You know, bending other
> dimensions… I’ve said too much!
>
> On Fri, Aug 13, 2021 at 2:04 PM David Eckhardt <davearea51a@gmail.com>
> wrote:
>
>> Your "secret" is safe, here!
>>
>> But, I have a rather monstrous common mode choke on the new
>> refrigerator/freezer power cord.  At least that was accessible unlike the
>> clothes washer/dryer and dish washer, and a few additional SMPS's in other
>> appliances.
>>
>> And.....if I get serious about a specific radio astronomy associated
>> project, only the computer serving that project is on.  All others are off
>> and the internet is OFF, including the wireless router. Not just OFF, but
>> denied AC power!
>>
>> Dave - WØLEV
>>
>> On Fri, Aug 13, 2021 at 5:31 PM Hare, Ed, W1RFI <w1rfi@arrl.org> wrote:
>>
>> > Every switcher that has caused me interference has been in my own home,
>> > but don't let on. If it ever got out that W1RFI had RFI, my reputation
>> > would be ruined. 🙂
>> >
>> > ________________________________
>> > From: RFI <rfi-bounces+w1rfi=arrl.org@contesting.com> on behalf of Jim
>> > Brown <jim@audiosystemsgroup.com>
>> > Sent: Wednesday, August 11, 2021 4:42 PM
>> > To: rfi@contesting.com <rfi@contesting.com>
>> > Subject: Re: [RFI] Mystery noise
>> >
>> > Great description. And when dozens of these free running sources are
>> > present (those in our own home and those in our neighbors' homes), the
>> > result can combine to look like broadband noise. This piece, which ran
>> > in NCJ several years ago, provides methods for finding and killing these
>> > sources. The process does NOT start with direction-finding -- that comes
>> > later after we've cleaned up our own homes.
>> >
>> > 73, Jim K9YC
>> >
>> > On 8/11/2021 12:21 PM, Hare, Ed, W1RFI wrote:
>> > > Switching regulators make noise ever N kHz, with N being the free
>> > running frequency of the internal circuitry.  The noise can be almost a
>> > carrier to just broadband buzz every N kHz, with a 120- or maybe 60-Hz
>> > component.
>> > > They are also drifty with temperature, change frequency with load
>> > changes and when there is a voltage dip or surge, they do a little
>> burble
>> > or change in frequency to match.
>> >
>> > _______________________________________________
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>> > RFI@contesting.com
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>> >
>>
>>
>> --
>> *Dave - WØLEV*
>> *Just Let Darwin Work*
>> _______________________________________________
>> RFI mailing list
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>> http://lists.contesting.com/mailman/listinfo/rfi
>>
>

-- 
*Dave - WØLEV*
*Just Let Darwin Work*
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