call sign lookup

The optimized wideband antenna - NW3Z yagi antenna designs for Dayton 2001 Includes yagis for 20 15 10 meters.

Beverage Antennas - So you want to build a Beverage Antenna.

Double Extended Zepp Antenna  ^pop - This double extended Zepp provides 3 db gain over a dipole on the band it is designed for. Each side or leg is about 5/8 wavelength long.

The Moxon Rectangle on 2 Meters - We often think of the Moxon rectangle as strictly an HF antenna. However, its small size and special far field pattern lend themselves to some VHF applications. So let's see how to adapt the design to 2 meters (as a popular band choice) and also see a few of the uses to which we may effectively put the design.

A linear loaded vertical antenna  ^pop - Vertical antenna design by David Reid PA3HBB G0BZF

Half Bobtail Antenna - design by Brian Williams, GW0GHF

A vertically-polarised VK2ABQ Antenna - design note by Brian Williams, GW0GHF

4 Square Vertical Phased Array - Improve your 80 and 160 meter signal without a Yagi!

KB1DIG's 2 Meter Antenna Design Gallery  ^pop - Home-brew antenna designs for VHF. 2-meter colinears, 2-meter Halo, and 6-meter Halo

Using Delta Matching on HF Beams - Using delta match with HF antennas design

Super Loop Antenna  ^pop - Superloop III designed by Jim, W4FTU

Limited space antennas - My site describes several compact antenna designs.

Smithe Windom Six Band HF Windom antenna  ^{updated  pop} - HF Windom antenna, cover 80, 40, 20 15, and 10 meters, antenna design by K3MT

Dipole / Inverted Vee Antenna Design - Formulas To Design Your Own Dipoles And Inverted Vees

Trans-Continental Dx Operators - 11 meter SSB Freeband radio group Founded in 1978, Over 3500 Signed up operators, membership is free.

Polish Callbook - Polish Callbook with search engine, QSL cards, photos and map generator.

National Radio Data - United States and Canadian call sign/scanner frequency databases, Worldwide airport frequencies, FIPS codes, Mass Media searches for DXing and more!

9H9SWT SES - "U.S. Swift Boat SailorsßReunion activities, Special Event Radio Amateur Station callsign ""N4S"" will be operating from March 20 to 23, 2003 from the Sheraton Waterside Hotel, Norfolk, Virginia USA."

Quadrifilar helicoidal antenna - Design your own quadrifilar helix, the site even generates a drilling pattern in a PDF file. Several different construction methods are shown.

Top 1000 HF Frequencies - Compiled by Larry Van Horn for Police Call

Design and build helix antennas - An on-line javascript calculator and quite a few pictures to show how to make a helix antenna.

LF Analyser - Professional analyser sound signals, scope, spectrum, spectrograph

QRO via Russia - Power amplifiers from amateur radio operators around the world which are designed/built using Russian tubes.

Eliminate That QRM - reduce or completely eliminate interference from almost any local source whilst leaving the wanted signal relatively unaffected, even though it may be on the same frequency

Bi-Pi Search Datasheet - Electronic component engineering, datasheet lookup system