transmission mode

Vertical antenna for 40 and 80m - Homebrew a vertical antenna for 40 and 80 meters band based on popular HF2V model by DL7JV

The Gain of the Axial-Mode Helix Antenna - by Dr. D.T. Emerson, National Radio Astronomy Observatory (NRAO++). Antenna Compendium Volume 4, pp 64-68, 1995, published by the ARRL.

Reflected W Beam - Hexagonal Wire Beams for 40-10m from DL7IO, different mono/multiband designs with building descriptions and model files for EZNEC

N. American Data Communications Museum - Telephony technology from telegraph to digital transmission

OH2GI Ham System - All-mode contesting and logging software system designed primarily for on-line operation of HF digital and CW radio stations through Terminal Node Controllers (TNC)

Beacon Transmission Schedule - This table gives the minute and second within each hour of the start of the first transmission of each of beacon on each frequency

C6AMS Bahamas DX Pedition 2010 - Online log and live audio from NA6M/C6AMS, N5BW/C6AMR, K2CK/C6ASH, K5AB/C6AAB and W5ETY/C6ATY will be active from Eleuthera Island, Bahamas (IOTA NA-001)(Grid FL15)9 July to 25 July 2010. Operating on 160-6m CW, SSB and Digital Modes

Tonga DXpedition Award - To gain Tonga DXpedition Award it is necessary to have QSL confirmed contacts with two amateur radio expeditions from Tonga (A35), on two bands, with two diffrent modes. Available also to SWLs

G7EXO's Hamradio Pages - Something for any station in any mode 600 pages of Hamradio

Signal Engineering - Signal Engineering technologically advanced antennas with modern design and construction technique. Up to date information about current line of high performance 10 and 11 meters antennas.

Tigertronics, Inc. - Packet/telemetry modems, GPS tracking, sound card interfaces

Olivia Modes - Olivia is a family of MFSK modes with a high redundancy Forward Error Correction system similar to MT63. General description and protocol information by w1hkj

Morse Code Teaching Machine - morse code machine to learn cw transmission

Ham Radio HF Digital modes - A complete overview of modern digital HF radio operating modes: PACTOR AMTOR GTOR CLOVER RTTY PSK31 HELLSCHREIBER PACKET MT63 MFSK16 THROB.

Keplerian Elements - Keplerian elements are the inputs to a standard mathematical model of spacecraft orbits.

High Frequency Propagation Models - Institute for Telecommunication Sciences High Frequency Propagation Models

VHF UHF Microwave Radio Propagation - Notes on radio propagation in that part of the spectrum (upper VHF to microwave) used by experimenters for high-speed digital transmission

ASTRO RADIO - Suppliers of Amateur Radio equipment, Antennas, accesories MFJ, Ameritron, Mirage, hardware and software for digital modes.

Weather Satellite FAQ - A comprehensive guide to receive Weather Satellites signals in wefax mode

RDCP/Mac - RDCP/Mac is a communications software package to interface your Macintosh to models of Kantronics TNCs. RDCP/Mac uses the Kantronics HOST mode allowing simultaneous connections on VHF packet and the HF digital modes when using the KAM.

TrueTTY Priority listing - Program for amateur radio digital communications via a sound card. Supported modes are RTTY (Baudot code), ASCII (7 or 8 bits), PSK31 (BPSK and QPSK) and AMTOR-FEC (SITOR-B, NAVTEX). SELFEC SITOR decoding is possible also. No additional hardware required, need only a sound card. Optionally you can use simple circuit fo PTT-control. Can cooperate with RZ4AG AAlog logger.

PKTerm 99 - PKTerm 99 host mode terminal software for the Timewave/AEA TNCs takes advantage of the true multitasking capabilities of Windows 95,98,NT.

XPacket - Packet-Radio-Host-Terminal - Packet-Radio Host-Mode-Terminal for DOS works also fine in Windows-DOS-Box. Lots of functions, includes userdatabase Name, distance, direction, qth, call, alias.

Picture Packet - A Windows95/98/NT control program for Terminal Node Controllers. In its Lite mode it's all the software many packet users may ever need, and it's free. Receive and display of full color, high-resolution images and audio files

HF Propagation Models from NTIA ITS - Windows-95/98/NT 32-bit HF Propagation Models from NTIA/ITS