19 meter

Understanding Standing Wave Ratios SWR - We worry a lot about Standing Wave Ratio (SWR) in amateur radio since SWR is one indication of how well our antenna system is working. Most HF transceivers and antenna tuners have built in SWR meters. SWR is a measure of a transceiver’s output power verses the portion of that power reflected by the antenna system By Ken Larson KJ6RZ

Transmission Lines - Whenever you choose a coax feedline, the frequency of operation is a very important consideration. Over the operating bandwidth of the coax the VSWR is low, typically 1.2:1 or better. Insertion loss is also an important parameter. It is usually specified in dB/foot and is a linear relationship.

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

Mobile Helix Antennas for HF - Normal mode helix antennas for HF mobile. Photos andn plan for a 20 meters mobile helix antenna by N2MH

A Magnetic Loop antenna for 7-21 mhz - If you find external wire antennas obtrusive for amateur radio or short wave listening, then this is the antenna for you, is just 1 meter diameter

Travel loop antennas Priority listing - PA11019 Travel loop antennas, these antennas cover 6.300 to 29.200 mHz , handle 35 Watts and have a packing size of 43 cm, ideal for fieldwork, or mobile operations.

Quad and ModQuad Antenna  ^updated - Some thoughts on a "hardware-store special" 2-meter quad, and a modified quad for 2 or 10 meters by K3MT

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.

CB TH-1 Priority listing - CB Club north greece established in 1982

DXQSM Freeband dx infos - Website for 11 meters freebanders activations , QSM adress( OM & email) logs links and dx cluster

DXIOTA Freeband IOTA info - Iota Website for 11 meters freebanders

DF3CB BV QSL Management and printing - DF3CB site, contesting, and software BV is a professional freeware software for the QSL Management and Label/QSL Printing under Windows developed and distributed by Bernd Koch, DF3CB, since 1989. It is mainly designed for the contester and QSL manager with high QSL quantities but useful for all other QSL'ing purposes as well. Includes logging features

10 Meters - European beacons map - Map in png format of european beacons transmitting on 10 meters band by Ari Catanzaro

GDXF - German DX Foundation - The German DX Foundation (GDXF), founded in 1996, was established to support HF DX activities - on all bands or modes - to rare countries all over the world

PJ9JT Contesting QTH - SignalPoint, Caribbean Contesting Consortium. Curacao. CCC's contesting QTH is the former home of PJ9JT, John Thompson, W1BIH. This historic site has been the home of many contest wins since 1971.

Popular Wireless Magazines Priority listing - Since 1995, one of best places to go for information about GMRS and FRS. Offer a bulletin board community on the topic

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

Freeband EQSO Server Priority listing - Eqso server for eleven meter freebanders. Only freebanders are allowed by this eqso server, based in spain

Let's Go T-Hunting - An introduction to RDF contesting in southern California, updated from a paper originally submitted for Proceedings of the 1992 West Coast VHF/UHF Conference.

Topband - 160 meter Radio Propagation - Here you will find a variety of tools which will hopefully help you improve your chances of succeeding at Topband (160 meter) DX.

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

Test & Measurement Equipment Buying Guide - Compare and select Test& Measurement equipment according to its technical parameters; access library of manufacturers specs and data sheets. TestBuyer.com

LOGic Ham Radio Software - Since 1989, LOGic has provided the amateur community with the ultimate in professional-grade ham radio logging software - the software with the most flexibility, the most features, and yet the easiest to use.