[amsat-bb] Re: RFI identification

Edward Cole kl7uw at acsalaska.net
Thu Jan 24 23:12:34 PST 2008

I have a couple IBM Thinkpads that have metal cases.  Extremely 
clean!  At work I recently bought a T61 Lenovo so we will have to 
test it.  At home I have a brand new Dell Vostro 2.33GB duoCore with 
2GB memory and 20-inch LCD display.  I'll let you know how it 
compares.  MY old Dell Dim 4100 PS radiates spurs on 2m.  Time for 
some ferrite chokes.

73 Ed - KL7UW

At 08:10 PM 1/23/2008, Nate Duehr wrote:

>On Jan 23, 2008, at 8:13 PM, Jim Shorney wrote:
> > On Wed, 23 Jan 2008 14:23:49 -0600, Wayne Estes wrote:
> >
> >> Computers are also extremely noisy!  When operating HF I never use a
> >> computer, every one I have ever had or used, adds at least 10 DB to
> >> the
> >> noise floor.
> >
> > I use an old IBM PS/2 Server 95 (microchannel) computer w/IBM 6091-19i
> > workstation monitor for logging. It won't run modern games, but it's
> > the most
> > RFI-tight computer I've ever seen.
>Metal case?  The old steel PC cases are the best RFI shielding they
>ever had.  The new plastic cases with what equates to aluminum foil on
>the inside, generally suck.
>The metal cases are getting hard to find, but you can still buy some
>metal cases and put modern motherboards in them, too.  Then run the
>station ground to the case, too.
>Nate Duehr, WY0X
>nate at natetech.com
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Ed - KL7UW
  BP40IQ   50-MHz - 10-GHz   www.kl7uw.com
144-EME: FT-847, mgf-1801, 4x-xpol-20, 185w
DUBUS Magazine USA Rep dubususa at hotmail.com

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