modes

H40FN H40FK Temotu WebSite - H40FNoperated by DK9FN and DG1FK using H40FK in digital modes

Dalry Amateur Radio Group - Small group of amateurs with varied interests ranging from packet radio and data modes to electronics and tutoring.

Downtown Amateur Packet Radio - Amateur Radio Club Dedicated to the Digital Modes of Communication

Digital Radio Modes - Sounds - Sounds of the hf digital radio modes

An Introduction to Datamodes - ARAC guide to datamodes

RSQ Signal Rporting for Digital Modes - This site is devoted to promoting RSQ as an improved signal reporting system for narrow band digital modes and to demonstrating its application to the popular PSK31 mode.

Introduction to Digital Modes - Wireless Society of Southern Maine, Digital Modes Page, introduction to amateur radio digital modes, including FLDIGI, PSK31, RTTY, high speed CW, Slow Scan Television, HF Weather Fax, WeFAX, MFSK16, OLIVIA, G-TOR, AMTOR, MT63, Digital SSTV, Frequency Key Shifting, and more

Ham Radio Digital Modes Information - WB8NUT digital modes information page with various digital modes description and sound samples

Data Communications - Digital Modes - Summary of digital modes, description of several operating modes, with sound samples by Highfields ARC

Digital Modes - Getting Started in PC Soundcard Digital Radio, basics of amateur radio digital modes

Amtor Digital Mode - About AMTOR Amateur Teleprinting Over Radio

Amtor mode - Information on Amtor mode with protocol details

Audio levels for digital modes - Setting audio levels for digital modes on FM

Hell Formats - Here is a simple definition of all the Hellschreiber modes

Getting started on data modes with the Elecraft K2 - You do not need an expensive or complicated interface to get started using psk31 and other data modes with an elecraft k2 transceiver.

Opto Interface for Digital Modes - N2UZ interface first designed to be used with Kenwood TS-570SG, but also used with Yaesu FT-1000M

APRS Messenger program - APRS over digimodes including PSK, QPSK and GMSK with digipeating and two way HF internet gateway to the APRS-IS

OZ2M - Next generation beacon - Next Generation Beacon hardware platform encompasses both analog and digital modes, i.e. CW FSK and MGM in a mixed mode configuration. The advantage of the mixed mode is that humans can decode the CW FSK by ear and the MGM can be decoded by computers way below what is audible. Therefore the MGM can be used for “pre-human-conditions” or early warning monitoring.

A Switchbox for Soundcard Digital Modes - A homebrewed switchbox prooject Don Wilhelm W3FPR

PSK31 interface - A simple PSK31/digital interface which can connect your transceiver to a PC soundcard for digital modes.