[amsat-bb] Re: RFI identification

[Jim Shorney]

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.

An AM "Walkman" type of portable radio can be handy for DFing RFI. The
loopstick antenna has very sharp nulls. "Calibrate" it using a signal from an
AM broadcast station with known (local) location.


73

-Jim

--
Ham Radio NU0C
TR7/RV7, TR6/RV6, T4XC/R4C, L4B, NCL2000, SB104A, R390A, GT550A/RV550A, HyGain 3750, IBM PS/2 - all vintage, all the time!

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