🚀 go-pugleaf

In sci.electronics, ame@matt.ksu.ksu.edu (Abdulrahman M El-Koubysi) writes:

>I am trying to put together a list of applications that could possibly use
>some shield from low frequency electromagnetic interference (EMI). Dose 
>anybody out there know of an application that could be improved if shielded 
>from EMI????

Absolutely. Nearly every type of consumer electronic equipment is
susceptible to interference from EMI. A nearby transmitter can cause
all sorts of problems in telephones, audio systems, computers, televisions,
VCRs, radios, alarm systems, lighting devices, intercoms ... the list 
includes nearly anything electronic.

Transmitters must also be shielded against the emission of signals that can
be the direct cause of EMI. In addition, many of the devices cited in
the first paragraph, plus a host of others, can be the source of interfering
signals. Possible EMI sources that should be shielded include: electrical
power systems, computers, motors, thermostats and switches, transmitters,
automotive ignition, etc.

In addition to shielding, filtering techniques can also be used to minimize
the unwanted interaction that results in interference.

The American Radio Relay League has a free handout about EMI called the
"RFI Package." (Send me email, including your postal address, with a 
specific request for the RFI Package.) We also publish a book about
EMI "Radio Frequency Interference - How to Find It and Fix It." Contact
ARRL for information about products and services.


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Ed Hare, KA1CV                  ehare@arrl.org
American Radio Relay League
225 Main St.
Newington, CT  06111            There is no limit to what you can 
(203) 666-1541 - voice          accomplish if you don't care who
ARRL Laboratory Supervisor      gets the credit. - Harry S Truman
RFI, xmtr and rcvr testing  
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