20 meter

IK1ZYW Vertical antenna - A vertical antenna for stationary-mobile HF-VHF operation. It works on 2-6-10 and 12 meters band.

Cedevita-20 Antenna - The Cedevita-20 is a hybrid monoband antenna, the result of merging the radiator of a shortened vertical with one element of a dipole. It fits on most balconies and must be hung from the ceiling. By ik1zyw Paolo Cravero

PA0NHC 80/40mtrs dipole antenna - Dipole antenna for 80 to 20 mtrs with END-coax feed by PA0NHC

SWR: Maximum allowable VSWR - VSWR (voltage-standing-wave-ratio) represents the degree with which an antenna is "matched" to the system impedance. Most modern antennas do not require any tuning for optimum performance. VSWR is one of the easiest parameters to measure and VSWR meters are becoming very popular antenna installation tools

Transmission Lines - Articles on SWR measurements and feed lines tuning.

SWR Calculator - BesserNet Reflectometer is a fun SWR calculator and simulator Java applet

The 5 Bands Wire-Beam - This wire-beam has one radiator-element, feeded with 450-Ohm-Wireman-twinlead and needs an antenna-tuner. For the bands 6m, 10m, 12m, 15m, 17m and 20m bended reflector-elements are used. The support is a cross of 4 fibreglass-fishing-rods

Modified Buddipole for 40 to 10 Meters - This is modified version of buddipole antenna, using vertical wires instead of telescopic ends by ks7j

Antenna Selection Made Easy - This page will help you answer important questions about antenna selection before you talk to a supplier. After reading this paper, you should be able to better determine the most important parameters you need to know for your antenna selection criteria.

52AT/EU-018 Streymoy Island - Faroe Islands - Information page about the radio activity of the Shadow DXers from Streymoy Island, Faroe Islands (EU-018) in 2005.

213AT/DX - Market Reef Radio Expedition 2002 - 213AT/DX activation by the Shadow DXers in 2002

NCDXF/IARU Beacon Project - The NCDXF, in cooperation with the IARU, constructed and operates a worldwide network of high-frequency radio beacons on 14.100, 18.110, 21.150, 24.930, and 28.200 megaHertz. These beacons help both amateur and commercial high-frequency radio users assess the current condition of the ionosphere

Six meter beacons - Beacons transmitting on 50Mhz band

Antartica Award - DX information on antartica stations like R1ANT, R1ANN

YI9PSE - YI9PSE IRAQ 2010 DXpedition web site from Kurdistan

Zanesville Amateur Radio Club Priority listing - The Zanesville Amateur Radio Club (ZARC) is an association for the purpose of providing amateur radio communications in times of emergency: installing, maintaining, and operating a 2-meter repeater and club radio shack, and promoting amateur radio in general.

Counter Surveillance - Field Strength Meter - The zap checker is a counter surveillance, bug detector, field strength meter

Telewave - Telewave's innovative engineering produces the industry's toughest antenna systems. Yagi, Fiberglass Collinear, and Dipole models are available from 66-2500 MHz. Wattmeters, test equipment,rf power meters, duplexers, filters and cavities, transmitters combiners

Maritime stations on 150 meters band - 2 MHz Medium Frequency Maritime Stations in PDF format

HF Radio wave propagation - Radiowave propagation in the medium and high frequency spectrum in DOC format

Isotron antenna manulas - From this page you can download the following manuals, in Adobe Acrobat format .pdf, 40 Meter Isotron, 80 Meter Isotron

Kenwood ts-2000 and packet/digital mode - Using the TS-2000 for packet and digital modes. How to connect the Kenwodd TS2000 to TNC

Yaesu mailing list - Yaesu mailing list archive

APRS-Beacon - The purpose of the APRS-Beacon is to provide simple APRS-compatible position beacons for up to three Objects. It is designed to 'stand alone' and does not monitor other traffic on the frequency. It can use a single-port TNC (in 'native' mode), a single- or dual-port TNC in Kiss mode or the AGW Packet Engine in order to transmit on up to four radio ports.(When running with AGWPE, APRS-Beacon will also work with Windows 2000)

The DX 200 amplifier - Interesting homebrew project by G4BXM, Roger