[Top] [All Lists]

[RFI] Intereference Database

To: "RFI List" <rfi@contesting.com>,"dk1max@darc.de" <dk1max@darc.de>
Subject: [RFI] Intereference Database
From: "Jim Brown" <jim@audiosystemsgroup.com>
Reply-to: Jim Brown <jim@audiosystemsgroup.com>
Date: Fri, 30 Jul 2004 11:35:15 -0500
List-post: <mailto:rfi@contesting.com>
I think this database could be a lot more useful if it listed specific "birdie" 
carrier frequencies and cross referenced to specific equipment or 
equipment types that produce those frequencies. 

For example, I've tracked down specific frequencies in several HF CW 
bands that are produced by the 10BaseT Ethernet gear in my office. They 

3511, 10106, 14029, 14030, 21052, and 28014.  I'm sure there are other 
frequencies associated with 10BaseT, but I'm a CW guy and this is what I've 
found. :) 

I've also learned that much of this is radiated by the CAT5 cable as a 
common mode signal, and that it can be significantly attenuated by winding 
the CAT5 cable around a ferrite core to form a choke. 

Jim Brown  K9YC

RFI mailing list

<Prev in Thread] Current Thread [Next in Thread>
  • [RFI] Intereference Database, Jim Brown <=