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ARRL General Bulletin ARLB073 (1995)

ARLB073 New RFI book from the FCC
QST de W1AW  
ARRL Bulletin 73  ARLB073
From ARRL Headquarters  
Newington CT  July 25, 1995
To all radio amateurs 
ARLB073 New RFI book from the FCC
The Federal Communications Commission has released a new
Interference Handbook for consumers.  The 24-page, full color book
will be stocked by FCC field offices around the country to provide
people experiencing interference to home electronic equipment with
information and solutions to interference problems.
The book deals not only with interference to televisions from radio
transmitters, but also illustrates and describes interference caused
by poor antennas (weak signals, ghosting); electrical interference
from home devices such as hair dryers; electrical interference from
power lines; and interference from home computers and low power
radio devices such as garage door openers.
In addition to interference to televisions, the handbook describes
solutions to interference to hi-fi systems, telephones, and video
cassette recorders.  Techniques for solving problems include the use
of ferrite cores, improving receiving antenna systems, checking
cabling, and isolating interconnected units to find the one that is
at fault.
The book lists addresses and phone numbers for sources of high pass
filters, common mode filters, band reject filters, ferrites and
beads, ac line filters, telephone filters, and interference
resistant telephones, as well as an extensive list of manufacturers
of home electronic equipment.
Page one of the new FCC Interference Handbook says ''Many
interference problems are the direct result of poor equipment
installation.  Cost-cutting manufacturing techniques, such as
insufficient shielding or inadequate filtering, may also cause your
equipment to react to a nearby radio transmitter.  This is not the
fault of the transmitter and little can be done to the transmitter
to correct the problem.  If a correction cannot be made at the
transmitter, actions must be taken to stop your equipment from
reacting to the transmitter.''
ARRL Laboratory Supervisor Ed Hare, KA1CV, says, ''This is the
statement from the FCC that hams have been waiting for.  The book
takes a fair and honest approach to explaining responsibilities and
cures for interference problems.  The FCC team that put this
together has done a fine job with a complex technical and emotional


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