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Re: [RFI] Every 60 KHz

To: rfi@contesting.com
Subject: Re: [RFI] Every 60 KHz
From: Dave Cole <dave@nk7z.net>
Reply-to: dave@nk7z.net
Date: Wed, 09 Mar 2016 20:29:44 -0800
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>
I am pretty sure the ones I have are grow lamps...  
-- 
73's, and thanks,
Dave (NK7Z)

For software/hardware reviews see:
http://www.nk7z.net

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http://groups.yahoo.com/neo/groups/MM-SSTV/info


On Wed, 2016-03-09 at 16:20 -0900, Christopher E. Brown wrote:
> On 3/9/2016 9:44 AM, Dave Cole wrote:
> > 
> > Hi,
> > If it is a SMS that has been on all night, they can get really
> > stable...  I have one that starts off really bad, then after three
> > or
> > four hours, it is rock stable...  
> > 
> 
> I would agree, don't discount SMPS or similar just because of
> little/no drift.  While a
> cheap wall-wart is almost certain to drift, something like a $300
> high efficiency battery
> charger or the like might not.  I have a couple of 50+ amp switched
> supplies that sit
> right at 43khz and don't drift more than a few hz/hr at the
> fundamental.  The hash is so
> wide that noticing any drift at say 80m would take hours of watching.
> 
> 
> 
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