[RFI] shielding question

Jim Smith jimsmith at shaw.ca
Tue Dec 23 00:52:25 EST 2003


Hi Jim,

I found the site where the papers are but AES wants $10 each for them. 
 Is it possible that you, being the author, can put them up on a web 
site and let the folks on this reflector know where to find them?  

73 es Merry Xmas de Jim Smith    VE7FO

Jim Brown wrote:

>On Mon, 22 Dec 2003 14:59:31 -0800, Jim Smith wrote:
>
>>Could you explain the mechanism (or point me to a source) whereby the 
>>sheld is rendered useless by the presence of a drain wire at HF?
>>
>
>I can do both. It's called "shield-current-induced noise," (SCIN). It
>was first described by Neil Muncy (ex-W3WJE) in an AES paper in 1994,
>based on research he did only at audio frequencies. I've done more
>research on it in the last year or so, publishing my research in two
>AES papers -- one in March, 2003, presented in Amsterdam, and one in
>October, 2003, presented in NYC. Neil's 1994 paper and my March paper
>are available from the AES (www.aes.org). The October paper will be
>there in a few months (for some reason, it takes a while after the
>convention to get it there). My March paper extended Neil Muncy's work
>to 4 MHz, the NY paper took it up to 300 MHz. Both of my papers include
>lots of data on real cables, and show the effect of various cable types
>on RF detection in equipment. They also document my test setup, and
>report of field testing of cables and equipment when exposing it to ham
>transmitters on Field Day, and to broadcast transmitters. 
>




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