Interesting sites list for amateur radio :
LABRE-RIO: http://www.hamway.del.ufrj.br
LABRE Confederação: http://www.labre.org
ARRL: http://www.arrl.org
CQ-Magazine:
http://www.cq-amateur-radio.com
Contest CQ-WW: http://www.cqww.com
QSL NET: http://www.qsl.net
QSL Magazine (Brasil) : http://www.qsl.com.br
QRZ ?: http://www.qrz.com
AMSAT: http://www.amsat.org
425DX: http://www.425dxn.org
Northern California DX Foundation: http://www.ncdxf.org
HF Radio.org : http://hfradio.org
Cluster
DX-Spots-propagation-sun: http://oh2aq.kolumbus.com/dxs
BuckMaster Callbook online : http://www.buck.com/cgi-bin/do_hamcall
Greyline realtime : http://www.fourmilab.ch/cgi-bin/uncgi/Earth/action?opt=-p
MUF online realtime : http://solar.uleth.ca/solar/www/realtime.html
Realtime tracking of
hundreds of satelites in 3D : http://liftoff.msfc.nasa.gov/realtime/JTRACK/3d/JTrack3d.html
Realtime tracking of amateur radio satelites site : http://liftoff.msfc.nasa.gov/realtime/JTRACK/Amateur.html
On-line
Calculus if radio-frequency are dangerous for you : http://n5xu.ae.utexas.edu/rfsafety
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