digital 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

Packet and Stuff - Links to useful packet and digital radio resources

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)

Mariana Islands DX Association - 96 pages, 450 pictures including hams in the Mariana islands and their shacks, QSL gallery, island photos, Digital Voice Keyer software, and lots more.

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

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

AB4EL Archives - Weekly archive of rec.radio.amateur.antenna rec.radio.amateur.digital.misc and rec.radio.amateur.homebrew

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

Terrasat Inc. - Manufacturer of Receiver and Transmitter for Digital Microwave radio and VSAT equipment

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

WM2U Digital communications - RTTY, Amtor, packtor, SSTV reference by WM2U

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

Scanner-radios picking the right scanner - There was a time that scanning was easy. There were no trunked radio links and no digital radios. There was no encryption with frequency hopping to drivge us scanner radio-operators nuts. And there were no laws at one time telling us what we can scan and what we can not scan. Fortunately even with the above scanning is still a fun hobby.

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

KG-STV - Digital SSTV software for Windows XP Vista and Windows 7

AALog by RZ4AG Priority listing - AALog is a comprehensive logger program designed for amateur radio station operators. QRZ,Buckmaster,Flying Horse lookup, CW/RTTY/PSK31 support, Digital voice processor. DXCC,WAZ,P75P,WAS,JCC,WAJA,WAIP,IOTA,Russia tracking. Many other useful features. eQSL.cc compatible. It look like your paper log and use all power your PC

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.

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