Transcription of A Ham's Guide to RFI, Ferrites, Baluns, and Audio ...
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A Ham's Guide to RFI, Ferrites, Baluns, and Audio ...
A Ham's Guide to RFI, ferrites , Baluns, and Audio Interfacing Revision 7 Jan 2019. by Jim Brown K9YC. The basis of this tutorial is a combination of my engineering education, 60 years in ham radio, my work as vice-chair of the AES Standards Committee working group on EMC, and extensive re- search on RFI in the pro Audio world where I made my living. That work is documented in techni- cal papers and tutorials that can be downloaded from the publications section of my website. For this latest revision, much of the material on common mode chokes for transmitting has been moved to a new applications note. Chapter 1 Some Fundamentals To solve interference problems, we must understand them.
loop area small also minimizes the extent to which the wiring can act as an antenna. When we use a closely coupled pair of conductors to form a transmission line, we are reducing the loop area, which reduces the total current induced in the loop by an interfering signal, and the total magnetic field produced by current in that loop.
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