Free Radio Books

Secret Signals

UVB-76 "The Buzzer" Primer

USAF Numbers Broadcasts


Uno Dos Quatro (Havana Moon)

The Radio Spectrum

Shortwave Spectrum Quick Guide

Ethics & Operating Procedures

US Amateur Radio Bands

EchoLink Users Guide

Important Radio Links


HF Underground

Signal Identification

Radio Intrigue

The Conet Project

The Conet Project - Recordings

University of Twente

Milcom Monitoring Post

Mystery Signals

Numbers & Oddities


Enigma 2000

Shortwave Info

Utility Planet

Utility DXers

The Spooks Archive

HF Propagation

Free Radio Software

FLDIGI Decoder

SDR# - Software Defined Radio

PDW - Pager & ACARS Decoder

VB Cable - Virtual Audio Cable

Audio Spectrum Analyzer

MMSSTV - Slow Scan Television

AFSK1200 - Packet Radio Decoder

Friend Websites

Books By Curt Rowlett

Labyrinth13 (PDF)

The Curse of Palmyra Island (PDF)

Riding On Your Fears (PDF)

(Or read them online at Internet Archive)