Cool stuff

Travis Goodspeed's Blog Lots of RF related experiments

Live OSCAR Satellite Status Page
Cheap and Easy Yagi Satellite Antennas
Building the UHF Cheap Yagi for Satellite Communication
Satellite Antennas Hints and Kinks
An Introduction To Amateur Satellite Ground Station Antennas
Amateur Radio Satellite Tracking
Operating SO-50
Working FO-29 Semi-duplex
Milsat related:
Solarix (Satcom and HF from southern california)
UHF SATCOM Satellite Downlinks Receivable in North America
UHF MilitäSatelliten im GEO. HEO und LEO
Fleetsatcom System
UFO Milsat Program
A How-to-Guide for Listening to the Milsats

HF Stuff
HF Underground
High Frequency Global Communications System (HF-GCS)
    What is an EAM?
    What is an Emergency Action Message or EAM?

Uniden Scanner Stuff
Easier to Read BCT15-X Scanner Manual

Encryption/Radio Security Stuff
Signals intelligence
DEFCON 20: SIGINT and Traffic Analysis for the Rest of Us Great talk at DEFCON 20 about the problems with ap25 security and its current implementation.
Defcon 18 - Practical Cellphone Spying Interesting, sets up a fake European band GSM tower (In the industrial, scientific and medical (ISM) radio bands - legal for HAMS), and turns off encryption
HakShop All sorts of Wifi goodies
Great Scott Gadgets
Rainbow table
DEFCON 14: A Hacker's Guide to RFID Spoofing and Jamming
Defcon 18 Extream range RFID Tracking Chris Paget

Digital Radio Stuff
World's cheapest P25 receiver w/ decryption: GNU Radio + OP25 +
The RTL2832U / Elonics E4000 SDR Radio – AKA “The $20 SDR”
RTL-SDR Tutorial: Decoding Digital Voice (P25) with DSD
    Digital Speech Decoder (software package)
    Free Virtual Audio Cable Alternative

Number Station Stuff
NPR's "Lost and Found Sound" radio feature, "The Shortwave Numbers Mystery."
Cuban Numbers Station in HM01 mode Funny, the first time I went to this site, I tried the first frequency in the list 5855 kHz on a Sunday night, and heard HM01!
ENIGMA 2000 - The European Numbers Information Gathering & Monitoring Association
transmitter "a short movie by christopher grabinski" - its a little creepy :)

Software Defined Radio
FUNcube Dongle
High Definition Software Defined Radio
SDR# (SDR Sharp)

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