[amsat-bb] Re: RFI identification
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
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