call sign lookup

80m 4 element delta loop antenna - A four element delta loop antenna for the 80 meter band providing a forward gain of 6 dBi by F5VKM

K8CU Log Periodic Antenna - Plans, photos, electrical and mechanical design for this HF Log periodic antenna.

Stacked Yagi Antennas - Constructing and designing full size, single band stacked yagi antenna arrays

EI Call Listings - EI Call Listings are maintained by Joe Ryan, EI7GY on behalf of IRTS

Luxembourg LX Callbook - Official LX Callbook and Member Directory of the Luxembourg Radio Society (RL)

Thunderbolt Amateur Radio Assn - "Amateur Radio Operators in Pueblo, Colorado have formed an association dedicated to public service called the ""Thunderbolt Amateur Radio Assn."""

Callsign Email Address - Show off your amateur radio callsign! Get your own email domain such as Lisa@K6AAB.com. Be a unique ham!

Balun Designs LLC - Balun Designs wind high quality baluns and ununs for Amateur Radio and commercial applications based on the researched and tested designs of Dr. Jerry Sevick, W2FMI.

BitScopes Mixed Signal Oscilloscopes - Robust and affordable PC based mixed signal oscilloscopes for Windows, Linux and Mac. Isolated USB or networked connection to one or more PCs. Data acquisition, waveform generation and multi-user options available.

First radio signal over Atlantic - Description od Marconi's first transmission over Atlantic Ocean

A Visit to Cape Cod - The place where Marconi received the first transatlantic signal

Six Meters FAQ - Faqs on six meters band, designed to help encourage hams to use and enjoy this band

VLF Time Signal Broadcasts - Station List Compiled by William Hepburn, LWCA

Introduction to MFSK and the MFSK16 - A new weak signal DX mode for Radio Amateurs, employing M-ary FSK, phase continous tones and convolutional coded FEC.

A beginner's guide to making CW contacts - Learning the code, answer a CQ, call your own CQ, QSO template for beginners and more

The KM5ES Weak Signal Homepage Priority listing - This website is for amateur radio op's that use VHF/UHF weak signal communication's. Also homepage for the Sidewinders on Two Radio Club or SWOT.

Douglas T. Smith Editorial Service Priority listing - Digital Signal Processing Technology: Essentials of the Communications Revolution by Doug Smith, KF6DX, ARRL, 2001, ISBN 0-87259-819-5

QSLArt - Qsl card design and printing by ik6rum

Voices of Distant Countries - Personal site of Russian DXer Dmitri Mezin. Contains a fresh edition of his Signal bulletin, archive of all previous issues and QSL gallery.

Replay Radio - Lets you automatically record your favorite radio programs from Web Radio broadcasts, and then listen to them later on your PC, MP3 player or Pocket PC.

EchoFilter - EchoFilter uses the soundcard of a PC to process income audio signals in real-time. The narrow filter bandwidth allow the extraction signals and sounds from the audio signal that may normally be close to inaudible. It is intended for radio HAMS, hobbyists, researchers, scientists and students in the DSP field.

RX-PSK31 - Easy to use Audio Spectrum and PSK31 decoding program specially designed for SWL's who don't need TX or for anyone who just like to monitor PSK31 or analyse signals. Adjustable DSP and Spectrum settings for audio and frequency spectrum to set for best decoding of PSK31.

FT100 SuperControl - CAT control and logging software project especially developed for the YAESU FT-100 transceiver. The program is based on the design of FT847-SuperControl.

Analyzer2000  ^pop - Superfast analyzer for audio and radio signals

WOLF - A proposed new signal format for LF weak-signal work, It can be used for beacons and for two way communication