feed line

Diplexer construction 2m/70cm and SW/VHF - Build your diplexer with more than 70db port isolation and less than 0.2db attenuation. Easy project.

Linear-Loaded Dipole for 7 MHz  ^pop - A short but efficient dipole for 40 meters band

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

K7EM 80m 4-Square Array - This array has been in use since 1989 The SWR from 3.5 to 3.9 is below 1.5:1

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

Shunt feed a hustler mobile HF Antenna  ^pop - 40 and 20 meters mobile antenna

HF mobile antenna  ^pop - Build your mobile antenna which outperforms Hustler by 10db and ATAS-100 by 18db. From 80 to 10m.

The Bird Feeder Antenna - A hidden antenna must be just that: hidden. So don't install an antenna, but something else. Lika a bird feeder.

Integrated Publishing Basics - Radio wave propagation, Principles of transmission lines, Antennas

DK7UY Online logs - DXpeditions, Online Logbook and personal stuff

OH6YF Log Search - Logs of: OH6YF, OF6YF, OG6YF, OI6YF, OH6Y, OG6Y, OH0MYF, OH0MYF/6, M0BYF, M/OH6YF etc... Over 140000 contacts online!

VK Classifieds - Australia's busiest radio related classifieds site. Free instantly online adverts from the VK/ZL area.

Great Circle calculator - Excellent on-line java great circle calculator with perl source code and excel spreadsheet for gc calculations

Global Overlay Mapper - Dynamic Map Progam with 34 maps, 442 overlays, and realtime position/locator info. Online Demo available. 0-59c per map.

IRLP Operating Guidelines - Operating procedures for IRLP use

Learn CW On-Line! - Learn the Morse Code (CW) Online, adaptive learning technology focuses on the characters that trouble you most

On-Line HF Propagation Prediction - *One single page* gives you an immediate overview of current shortwave propagation conditions at your location.

Outbacker Antenna shop - Outbacker HF Mobile Antenna from Down-Under, Old Fashioned Service in secure online shopping

Difona Communication GmbH - Transceivers, anntennas, PA, power supplies, accessories from Kenwood, ICOM, Yaesu, MFJ, ACOM, DAIWA, Diamond, DXSR, Alinco, Ameritron, ETM, Fritzel, UKW Technik, AOR, Bencher, Create, G.B., Heil, Hotline, Maldol, Tonna, Titanex, Outbacker, Hy-Gain, Mirage, SCS, SGC, SSB Elektronik

Scanner Master Police Scanners - Police scanners by Uniden Bearcat Scanners, port radio scanners antennas parts or listen to live online emergency police broadcasts with radio frequency codes by Scanner Master

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

EMMCAP - EMMCAP is a user-oriented 3D Curved MoM software for the modeling of arbitrarily shaped wire structures and the computation of their electromagnetic behavior.

11Meter Amps  ^pop - This group is here to discuss linear amplifiers used on the 11 meter citizens band.

IK4AUY Sergio - Advanced QRP Low Cost Mosfets HF Linear Amplifier with schematics, IMD, gain data and more. Six articles about amateur radio.

SWR bridge - This SWR bridge works by sampling the amount of power flowing in each direction along the aerial feeder.