digital audio

PY1UNU dipole for 80 meters - A dipole with coils for 80 meters band in portuguese.

Antenna Height Above Average Terrain - Antenna Height Above Average Terrain (HAAT) Calculator

G5RV 80-10 m antenna by PP5VX - A project for a multiband G5RV antenna that can run from 80 to 10 meters in portuguese

Windom antenna by PU1LHP - Project of a windom multiband antenna for 10 to 80 meters in portuguese

HamRadio-DV - Digital voice amateur radio association

the BATC D-ATV forum - DATV Digital Amateur Television forum managed by The British Amateur Television Club

Hamnet - Listen to the SARL Hamnet weekly audio report transmitted on Amateur Radio Mirror International Sundays at 10 CAT Sunday

Digital Operating Modes - Description, frequencies and sound samples of most popular amateur radio digital modes by DG8FBV

YouTube - DL0DTV Digital ATV - Digital amateur tv and mobile transmitting around Friedrichshafen and Lake Konstanz to be seen in Hall A. Heinz DC6MR is presenting the news, novelties and technical aspects of DATV.

Green Heron Engineering - Makers of universal digital rotor controllers including wireless controllers

W8DIG Central Ohio Digital Interconnect Group - Group of dedicated amateur radio enthusiasts who want to further digital modes of communication in the central Ohio area. We have been active in packet, APRS, VOIP and are now proud to provide D-Star digital voice and data connectivity.

D-ATV.com The Ultimate Resource for Digital Amateur Television  ^updated - All you ever want to know about d-atv, datv and digital amateur television. d-atv.com is a site about the new digital amateur television age.

Digital TV News - Information about digital atv and diffenrences between DVB standards

A D-ATV transmitter project - Build this simple and cheap 70 MHz Exciter and start to transmit Digital Television by Jean-François Fourcadier, F4DAY

Introduction to Digital ATV - Introduction digital atv in the 70 cm band

Ham Radio Online - Digital ATV First! - This Announcement First Appeared 13 August 1996 on the ATV Mailing List

Digital SSTV images  ^new - HAMDRM pictures received on 80 meters band at 3733 KHz

Fuji-2/OSCAR-20 - Fuji-OSCAR-20 is the second in a series of Japanese Amateur communications satellites having both analog and digital Mode J transponders

Tower Electronics - PL-259, Motorola & N connectors, Coax Seal, universal adapter kit, TNC, Mini-UHF, SMA, F & BNC connectors, audio connectors,antenna mounts and antennas

RF Stuff - Online shop for two way radio communications and amateur radio products, antennas, coax and cables, adapters and mounts, accessories and audio parts

Anritsu Connection - Anritsu provides solutions for wired and wireless communication systems and operators. Anritsu products include wireless, optical, microwave/RF, and digital instruments, as well as Operations Support Systems and solutions for use during R&D, manufacturing, installation, and maintenance.

AirLink Express - AirLink Express is a user friendly digital mode software package for the Amateur Radio Operator. The software is compatible with Microsoft Windows XP and Microsoft Windows Vista. It offers PSK, MFSK and RTTY digital modes with logging and macro capabilities. If you have ever used the Digipan software you will be immediately familiar with Airlink Express. The user interface is almost identical by Alex Krist, KR1ST

Spectrum Analyzer Real-time FFT - Eight-channel Audio Spectrum Analyzer is a set of Real-Time Multi-Channel Gauges for investigation of data accepted from any ADC you will want or 16-, 24- and 32-bit ADC of sound card. WDM drivers support. FFT Spectrum Analysis, OscilloScope, Frequency counter, AC/DC voltmeter, Signal-to-Noise Ratio, Signal-to-Noise and Distortion, Spurious-Free Dynamic Range, Effective Number Of Bits, Total Harmonic Distortion, Inter-Modulation Distortion, Phase Shift. Special modes of dual-channel FFT spectral analysis: Separate channels spectra, Spectra of digital sum, difference, product of two signals, Spectrum of digital product of original signal and its fundamental, Spectrum of Real and Complex Transfer Function, Cross Spectrum. Standart weighing of spectra according IEC and CCIR. Oscilloscope modes (for dual-channel ADC) are: original signals, sum, difference, dependence of one channel on another, amplitude distribution of input signals.

Bluetooth Audio and Amateur Radio - Bluetooth headsets are very common with cell phone users. As such, many amateurs may already own a Bluetooth (BT) headset. So why not use it with amateur radio?

Tools4SDR : SDR Collaborative website - Home page of Tools4SDR. Tools4SDR is a collaborative website about software defined radio (SDR), the universal software radio peripheral (USRP), opportunist radio, cognitive radio, software toolboxes for research and teaching in digital communications.