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Re: [RFI] HF RFI from digital displays on big Farad caps?

To: RFI List <rfi@contesting.com>, doc@kd4e.com
Subject: Re: [RFI] HF RFI from digital displays on big Farad caps?
From: Michael Germino <ad6aa@sbcglobal.net>
Date: Thu, 18 Jun 2009 11:32:09 -0700 (PDT)
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>
I am using one mobile.  No problem with RFI from or to, at 100 watts.


Mike
AD6AA

--- On Thu, 6/18/09, kd4e <doc@kd4e.com> wrote:

> From: kd4e <doc@kd4e.com>
> Subject: [RFI] HF RFI from digital displays on big Farad caps?
> To: "RFI List" <rfi@contesting.com>
> Date: Thursday, June 18, 2009, 10:13 AM
> I am going to be using a somewhat
> modified Messenger M4V 
> solid state
> amp for 160-10M.
> 
> I will be adding a bandswitched filter, a SWR protection 
> circuit, some bias
> mods, and will make various other tweaks so that it runs 
> clean and safe.
> 
> In order to prevent FMing or audio oscillations I will add
> 
> one of the big
> Farad caps to the DC supply line to keep the voltage from 
> varying during
> modulation peaks and dips.
> 
> I notice that some of those caps have a digital
> display.  I 
> am guessing that
> the circuitry is really cheaply made with little or no 
> bypassing or shielding.
> Has anyone tested them for RFI?
> 
> -- 
> 
> Thanks! & 73, doc, KD4E
> FS/Swap/Wanted: http://kd4e.com/swapn.html
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