code oscillator

Automatic Band Decoders - To build a Band Decoder to drive our remote relays, we need to supply the band information from the rig to the decoder

YO4PX Francisc Grunberg blog - Articles about Amateur Radio, own writings and translations: history, DXpeditions, contesting and DXing ethics, Codes of Conduct, Suggestions for Pile-ups, Suggestions for Contesters, the most wanted DXCC entities.

Ontario California - Police - Transmitting channels 1-2-3-4, hosted by code-3.org

Byonics - Manufacturer of popular TinyTrak APRS Tracker offer Packet radio tools, wxtrack interfaces, TinyTrack3, a GPS position encoder, PicCon controller for transmitter hunting, GST-1 and GST-2 GPS format converters, and PeekPack, a packet radio monitoring tool.

The Baudot Code - Table that represents programmer's quick reference to the Baudot character set.

Morse code vs SMS - Speed test - Morse code trumps SMS in head-to-head speed texting combat

Morse Code Music - Connecting rhythm and language with Morse Code by Phil and David Tulga

Why is Morse Code Still Used? - Interesting article by WY3A explaining benefits of operating CW

K5BCQ Morse Code Key collection - Collection of morse keys

J.H. Bunnell Keys - History of J.H. Bunnell & Company and their morse code keys

DK9IP - A Band Decoder for the TS-850 - A Band Decoder for the Kenwood TS-850 HF-Transceiver by Winfried Kriegl DK9IP/KH7CD (April 2001)

Numerical Electromagnet Code (NEC) Archives - The unofficial Numerical Electromagnetic Code (NEC) Archives, antenna analysis software

DSCdecoder - DSCdecoder decodes the DSC digital signals from ships and coast stations using the sound card in your PC. You need a suitable MF, HF or VHF band radio receiver tuned to one of the DSC distress and calling channels or to one of the Navtex channels

DTMF decoder - A very easy to use program to decode DTMF dial tones found on telephone lines with touch tone phones. The DTMF Decoder is also used for receiving data transmissions over the air in amateur radio frequency bands.

Fast Morse - Macintosh morse code software, Fast Morse will convert any text you enter into the original Morse code equivalent, and play it on your speakers. The speed can be adjusted to anything from 1 to 35 words per minute if your computer can keep up, allowing you to send Morse signals at a rate your friends and fellow Morse enthusiasts can follow!

Morse Code translator widget - Macintosh widget converts text to Morse code and vice versa

Black Cat CW Keyer - Black Cat CW Keyer for Macintosh lets you send morse code from your computer. You can type out the text to be sent (immediately or buffered) as well as create and send from one key

TWCW - This linux program will send Morse Code via soundcard or serial port by WA0EIR

EhoCW - CW Keyer software by F8EHO keyer and decoder functions, with interfaces with emitter/Receiver, memories, variables for call sign, mp3 and wav morse conversion, direct keyboard keying, joystick or serial interface for a morse key

Morse Tone Encoder - Generates Morse tones using the Soundcard. A neat tool for sending out short sequences of Morse tones.

CwGet PPC  ^updated Priority listing - A program to decode Morse code via sound input of PDA to text. No additional hardware required - your need only receiver and PDA with sound input. Built-in microphone of device can be used also.

SweepGen - SweepGen turns a PC into an Audio Oscillator and Sweep Generator which can be used for testing audio or educational purposes. In conjunction with audio test instruments, you can make frequency response plots. SweepGen uses the sound card in your PC to produce sinewaves

Voice descrambler - This program descrambles band inverted encrypted transmissions, usually found on VHF/UHF. It uses a NCO (numerical controlled oscillator) to re-produce the originally inverted audio band. Use it only if legally permitted in your country. I assume no responsabilities deriving from its use. Standard disclaimer applies

DTMF encoder - Generates dial tones using the Soundcard. A neat tool for sending out short sequences of DTMF tones.

Codec 2 - Codec2 is an open source low bit rate speech codec designed for communications quality speech at around 2400 bit/s. Applications include low bandwidth HF/VHF digital radio.