mode identification

Horizontal dipoles - This article describes the characteristics of an horizontal dipole and shows the results of several simulations made with MMANA-GAL, covering models for the 20 m, 40 m and 80 m bands.

Normal Mode Helix Antennas for HF - Normal Mode Helix Antennas for HF Mobile

Rhombic Antennas and Inverted V - The rhombic antenna is often claimed to be an exceptionally good antenna with very high gain. Modelling rhombic antennas

Ground Plane Verticals - Ground Plane antennas and common mode

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

PM-SDR - A new SDR-receiver from the italian SDR developers community. Low-cost, DDS-less Software Defined Radio full coverage receiver for all HF bands, used with powerful software on the PC for multi-mode operation

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

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

The Advantages of CW - CW is not just another mode like SSB, FM, PSK-31, etc. It is a unique mode that has alot of advantages.

Packet with Soundcard - Sound card packet by NM5RM. This amateur radio web site explains how to use the AGWPE utility program to send and receive packet using the sound card or sound chip of your PC instead of a traditional TNC or radio modem

IN3ECI - QRP Operations - Italian station operating mostly in QRP Mode, contain some interesting QRP projects for portable antennas and antenna mounts.

Satellite Tracking and Orbital Predictions - Web based satellite tracking and orbital predictions in real-time with simulation mode tracking including sun tracking and moon tracking.

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

Amateur Radio Call Log - Amateur Radio Call Log is a basic ham radio logging app for Android 1.5 and above. It stores Date, Time, Station, Freq, Mode, RST, and additional comments. Also has the ability to easily look-up callsign information from the FCC database.

DX Cluster for Android Priority listing - DX Cluster is an DX Cluster client for Android smartphones DX Cluster supports: Real time DX spots, Different band and mode filters, A country filter for spotter or the spots, Prefix or call sign alarms

OscarDelta IP Over AX.25 - This is a packet radio software developed for amateur radio operators to provide IP communications. You can chat, send/receive e-mail, surf the web and so on via radio depending on your bandwidth. You don't need a TNC. You might have all of TNC features via SoundCard using SoundModem.

MiniDeluxe - MiniDeluxe is a light-weight replacement for Ham Radio Deluxe that provides interoperability with FlexRadio's PowerSDR and Ham Radio Deluxe's Logbook and digital mode programs

phpPredict - Implementation of NORAD SGP4/SDP4 algorithms in PHP for determining a satellites location and velocity in Earth orbit. These SGP4/SDP4 models were ported from Predict 2.2.3 written by John A. Magliacane (KD2BD) for the Linux operating system.

MeteoFax32 - Weatherfax decoding software with modem

Multimode - A new app for Ham Radio running on IPhone and IPod touch. Multimode is a modem for RTTY BPsk31 & QPsk31, with spectrum analyzer and Macros for easy operations.

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.

What cause key clicks - Clicks are most problematic when we try to copy weak signals next to moderately strong signals. How to recognize them, and how to identify clicks problems