modulation sound files

80 meters wire antenna  ^pop - A reduced-size 80-meter antenna designed for small lots, portable use, and a fine companion for QRP

Greek Islands - by SV2AEL

NZART Exam Question Bank - The New Zealand Amateur Radio Examination Question-Bank December 2006

50 Mhz Sounds - Large collection by vk2qf

Microwave audio samples - 10GHz Rainscatter audio files

50MHz Sound Archives - Real Audio sound archives from H44PT cycle 21. Also from cycle 23 G8BCG, Z2/G8BCG, ZB0/G8BCG.

6mt.com Six Meters World Wide - Devoted to 6 meters and consist of The Six Club and technical files for vhf through microwave

DK8KW Longwave Information - Useful pages of longwave operations, includes a lot of reference files, beacons list, sounds and pictures

MFSK16 Reference Documents - Performance Reports, Sound Samples and specifications of MFSK mode

MFSK for the New Millennium - Using MFSK mode, 98 Kb PDF doc, taken from QST January 2001

K4SET, Soundcard Digital, MFSK - "MFSK and the SoundCard Digital Software Revolution"" by K4SET and WD4HVA"

Loop Recorder - Sound recording software for windows record anything anytime

Cybercorder 2000  ^pop - You can use like a VCR to record from your radio, the internet, or any sound input. Recordings are saved as WAV or MP3 files on your PC hard disk drive, and can easily be played back from the list of completed recordings.

DART - Clean up audio files and record high quality audio CD's!

EchoFilter - EchoFilter uses the soundcard of a PC to process income audio signals in real-time. The narrow filter bandwidth allow the extraction signals and sounds from the audio signal that may normally be close to inaudible. It is intended for radio HAMS, hobbyists, researchers, scientists and students in the DSP field.

TCalc - TCalc+ analyses the Noise and intermodulation performance of radio receiver front-ends.

Macpcr - Icom PCR1000 driving program for Mac available at yahoo groups, login required.

MRP40 Morse Decoder  ^pop - Program to receive morse code via sound card, Windows 9x/Me/XP, it allows to transmit morse code from the keyboard. Includes a comfortable Audio Analyzer Display. Successor of known MRP37

Morse Code Practice Java Applet  ^updated - CW ear trainer for Java-enabled browsers. Sends custom text, random groups of letters/digits/punctuation, or any random characters. 5-18 WPM code speed (18 WPM character speed).

SeaTTY RTTY/NAVTEX decoder - Program to receive weather reports and navigational warnings transmitted on longwave and shortwave bands in RTTY and NAVTEX modes. None additional hardware is required - your need only receiver and computer with a sound card.

Simplex - SIMPLEX is a free windows program which transforms any transceiver into an audio repeater. It works on HF, VHF, UHF etc with SSB, CW, FM, packet, SSTV and every modulation mode.

Freq 51 - Program samples the input, performs an FFT, and graphs the output

GSpec - Spectrum Analyser for Win9x/2000 and NT, that will display audio input to your sound card in the Frequency and Time domains

VoiceKeyExpress - Turns your PC's sound card into a powerful and versatile digital voice keyer. Commercial by n7qjp

Rtty interface (FSK/AFSK) with sound cards - "How to remove the so called ""ground loop"" and the reentry in the RTTY broadcast and make radio and PC happily coexist"