[WriteLog] Interference found

Jerry Pixton jpixton at shentel.net
Thu Jul 21 10:59:26 EDT 2005


All who responded,

I found my noise generator. Something many of us have in the shack. The 
network hubs!

I have two local area networks for the house/shack. One internal for 
sharing between computers and one external for access, through DSL modem, 
to the internet. Firewalls between in DMZ style. Both hubs, Linksys/Cisco 
are generating about a 60 Khz noise (from some sort of switching power 
supply?) and are just slightly out of frequency with each other; thus two 
tones.

I have been using these hubs for over two years in the other house and 
never suspected any noise from them. But I had good outside antennas, not 
some dipoles laying here on the floor.

Now to figure out what to do about the noise? Get different hubs? Get Cisco 
to replace them? Has anyone else had problems with the Linksys hubs?

Now that I at least know what is causing the noise, I can get back to 
wiring the station, HI

Jerry, W6IHG
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Dr. Jerry R. Pixton, PIXOS Designs LLC
http://www.pixos.com/designs/RadioTuner/
jpixton at shentel.net
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