mode identification

20 Meter Ground Plane Vertical Antenna - This is a ground plane antenna for 20 meters with an imput impedance of 50 ohms

Phased Array Adjustment - KM5KG article presents a lumped-parameter tee-network model of the coupling between radiating elements in a phased array in order to provide a physical and intuitive understanding of phased array operation and adjustment interactions

DG0KW Multiband dipole - German article on the multiband dipole by DG0KW. This antenna can be configured for several bands and can work in 3 or 4 bands mode. Can be used in restricted space lots.

Digital mode journal - Digital mode opeartion dialy blog

Digital on Six - Amateur radio digital modes on 50 MHz club page

IZ1PKI Alessandro - Welcome in IZ1PKI ham radio website

Digimode Sounds - Audio recordings of popular and not yet so popular digimodes

Digital Modes Samples - Audio recording of many ham radio digital modes emissions. Sound samples of HF VHF digital signals samples and published by KB9UKD

Nautel - Nautel offers the industry's broadest offering of solid-state DRM and DRM+ transmitters with models ranging from 1kW to 2000kW MW and 300W to 88kW FM.

EZE UK PCInterfaces - Digital mode interfaces are a speciality of EZE(UK). We are designers, agents, and manufacturers of both commercial, and ham radio interfaces together with programming units, and controllers.

Starman Electric - Starman Electric manufactures DataBridge wireless RF modem modules for easy point-to-point wireless data transmission of analog, digital, and serial RS232 UART signals.

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.

Digital Modes Information Page - An overview of digital HF radio operating modes includes a sample audio recording of each digital mode by WB8NUT

CMSK - CMSK is a narrow-band weak signal digital mode for LF and MF ham radio bands defined by ZL2AFP. CMSK63 is the windows client program.

G6GVI's data transmission page - WinDRM for rapid data transmission over radio channels. A quick-start guide by Ross G6GVI and Jack G8HIK

Other Digital Modes - Whats new on ham radio with digital modes? DRMDV

digitalvoice Group - Digital voice on Amateur Radio - devoted to the discussion of digitized voice and data over analog emission modes.

PSK31 Fundamentals and Setup - Background: The PSK31 philosophy, The QPSK mode, Varicode, Sound Card DSP Setup and Operating Tips

Getting Started with FT-817 in Digital Modes - Getting Started with Digital Sound Card Modes with the Yaesu FT-817 Transceiver by Clint Hurd KK7UQ

JT65-HF - Download setup JT65-HF Free HAM software by IZ4CZL for Terrestrial JT65A mode by W4CQZ

Baycom Modem - Baycom modem, The famous "PMP" (Poor man packet!)

Radio Modification Information Center - Tips, tricks, and modifications of Ham rigs, Ham modems, and more equipment.

Sub-Tone Generator for repeater triggering - If you need a cheap and easy to construct Subtone Generator for EU-model VHF-UHF rig, here is a solution that works very well.

USB Warbler - This project describes how one USB port can provide all of the signals necessary to operate a transceiver in digital mode from a Windows XP laptop by KG4JJH

Sound Card to Radio Interfacing - Sound card Hamming, PSK31 and other digital modes, CQ amateur radio article by K5ABT