General Information
Take ham exams on-line!
Open Amateur Repeaters online directory
Handy Shortwave Chart
Yahoo:Amateur Radio
Amateur Radio Elmers Resource Directory
Amateur radio info from NCSU

Online callbooks
HamCall.net callsign server
QRZ callbook
Digital QSL cards on file at QRZ
International callsign prefixes

Maidenhead grid square maps
Northwestern American grid square map
Convert between Lat/Lon and Grid Square
Convert street address to lat/long

Ham software for PC, Mac, and others
QRZ shareware
Oakland University
Tucson Amateur Packet Radio

Companies
All Electronics Corp.
Alinco
Alltronics
Amateur Electronic Supply (AES)
Anaheim Wire Products
Brigar Electronics
Communication Headquarters, Inc.
Down East Microwave Inc.
Electronic Rainbow Inc.
Fair Radio Sales
Gateway Electronics
Grove Enterprises
Ham Radio Outlet (HRO)
Icom
Javanco
Kantronics / RF-Concepts
Kenwood North America
M² Antenna Systems
Maha Communications
Metrosoft
MFJ Enterprises
Optoelectronics
Pasternack Enterprises
Polaris Electronics Specialty Shop
Ramsey Electronics
The Raymond Sarrio Company
Resources Unlimited
SSB Electronic USA
Standard Radio
Surplus Sales of Nebraska
Tigertronics
Timewave
Yaesu

More specific information
Emission Types Defined
Real-time propagation information
Coaxial Cable Data
FCC homepage
The ARRL
EFNET IRC #hamradio channel
California VHF page
AF9Y's EME and weak signal page
The Packet Radio Home Page

Amateur Radio Clubs and Organizations
Antelope Valley Amateur Radio Club
Barstow ARC
Citrus Belt ARC
Golden Triangle ARC
Boston Amateur Radio Club
Kern County Central Valley ARC Bakersfield CA
Lake Isabella Amateur Radio Assn. Lake Isabella CA
Santa Clarita ARC
Sierra Amateur Radio Club WA6YBN, Ridgecrest CA
Southern Sierra Amateur Radio Society Tehachapi CA
Stanford Amateur Radio Club W6YX
Tucson Amateur Packet Radio
Victor Valley ARC

Internet Newsgroups
rec.radio.amateur.antenna
rec.radio.amateur.digital
rec.radio.amateur.dx
rec.radio.amateur.equipment
rec.radio.amateur.homebrew
rec.radio.amateur.packet
rec.radio.amateur.space
rec.radio.amateur.swap
rec.radio.swap