[Elecraft] RFI on K3s

[K9MA]

I've also used that Samlex supply, with no sign of RFI. 

Scott. K9MA

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Scott Ellington

 --- via iPad

> On Jun 20, 2016, at 8:17 AM, Marty Koszewski <mtkoszew at gmail.com> wrote:
> 
> I had the same issue.  It was caused by my Powerwerx SS-30DV.   After trying a number of things to mitigate the noise, I ended up replacing the power supply with a Samlex SEC 1235M.  Noise gone.  Problem solved.
> 
> Marty - K1MTK
> 
> 
> -----------------------------------------------------------------------------------------------
> 
> 
> 
> 
> Message: 20
> Date: Sun, 19 Jun 2016 23:55:59 -0500
> From: Clay Autery <cautery at montac.com>
> To: Elecraft Reflector <elecraft at mailman.qth.net>
> Subject: [Elecraft] RFI on K3s
> Message-ID: <d758bc65-135d-95dd-c423-88b34ea3e4cf at montac.com>
> Content-Type: text/plain; charset=utf-8
> 
> I am seeing a repetitive RFI source every 34kHz from somewhere less than
> 20MHz thru 30MHz plus...
> 
> See attached image.  The amplitude alternates high/low every other
> appearance.  The overall amplitude is higher or lower depending on the
> location within the spectrum....  Almost a sine wave function with a
> VERY long period.
> 
> Anyone want to hazard a guess as to what is causing it?  I disco'd every
> switch-mode power supply in the shack and adjacent rooms (couldn't do
> the whole house as the XYL was home).... EXCEPT my Powerwerx SS-30DV PS
> running the K3s/P3.
> 
> Don't have a battery to run the radio on right now...
> 
> 
> 
> -- 
> ______________________
> Clay Autery, KY5G
> MONTAC Enterprises
> (318) 518-1389
> 
> 
> 
> -
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