saint jean sur richelieu

Ground System on a 160M vertical - Ground system measurements on a 160 M vertical by Rudy Severns N6LF

How to make an end-fed antenna work  ^pop - Here is a sure fire way to make end-fed halfwave antennas fed with a 50 ohm coupler work - without long radials, grounds, chokes, voodoo.

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

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

Setting the SWR of Your Antenna - SWR (standing wave ratio), is a measurement of how efficiently your antenna system will radiate the power available from your radio. In simple terms, your radio would like to radiate all of its power, but can only do so if the other components cooperate

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

Antenna Tuning - Tuning mobile and base antennas, measuring SWR.

Antennas basics  ^pop - An antenna study guide by NZART, cover basic topics like dipoles, wave lenght calculation, baluns, beams, dummy loads, and measurements.

DL7DF and Crew - DXpeditions - DXpeditioning since 1993, February/March 2006 - Saint Martin & St. Maarten FS and PJ7, October 2005 - South Africa ZS1/DL7DF, April 2005 - Ghana 9G5SP, Feb/Mar 2005 - British Virgin Islands VP2V/DL7DF, October 2004 - Cameroon TJ3SP, February 2004 - Kenia 5Z4HW , October 2003 - Myanmar XZ7A, March/April 2003 - Tobago 9Y4/DL7DF, Oct/Nov 2002 - Guinea 3XY7C

The Society for the Preservation of Amateur Radio - The Society for the Preservation of Amateur Radio is a non-partisan group of concerned amateur radio operators working together to ensure the vitality of the Amateur Radio Service by promoting technical abilities among Amateur Radio Operators. Includs a beginners guide booklet.

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

Frequency Calibration for Weak Signal Work - Accurate calibration of your receiver and sound card is necessary for good results with the weak signal modes in use at LF. Modern receivers with master oscillators that are synthesized to provide all conversion frequencies greatly simplify the process. This article describes a method of making the necessary measurements and adjustments to an ICOM R75 receiver and a sound card, using the ARGO software

Direction finding, HVDFA - The HVDFA is dedicated to fostering skills in the area of Radio Direction Finding as an interesting facet of Amateur Radio, both as a sport and for public service, in the multi-state region surrounding the Hudson River Valley of New York.

QST : Kenwood TS-2000 review - Product review & short takes columns from QST magazine

The Yaesu FT-1000mp mark-v review - Luxorion Yaesu FT-1000MP Mark-V transceiver review

Baudline signal analyzer - A Linux based FFT spectrum analyzer designed for time-frequency browsing and scientific data visualization. Oscilloscope waveform, statistical histogram, accumulated spectral trace,Weak Signal reception, continuos data logging, FFT Analyzer and specialized measurement windows.

Recovering parts from surplus - What electronic parts you can recover from PC monitor, VCR, CD-ROM, FDD, HDD , Laptop, Motherboard, SmartCard reader or Printer

Precision Frequency Enthusiasts - Frequency measurement for beginners, technical terms related to frequency measurement and accuracy, techniques and calibrating procedures.

CB Mic Wiring  ^{updated  pop} - Excellent resource for microphones wiring including old make of cb radios. Microphone wiring can be a real pain if you arent sure how to work out which wire goes where. On this page i will try to explain the basics and also give you the wiring positions for most CB radio's

Tuna Tin - A resurrection of some homebrew projects from our vintage years and the NorCal-sponsored project series in tribute to Doug DeMaw, W1FB

Powerline communications - Europeam perspective on BPL PLC

Broadband news: EU sets bpl guidelines - The EU has followed the U.S. lead in clarifying rules surrounding BPL (broadband via power-line) technology

Amsat-na government filings - Amendment of Part 15 regarding new requirements and measurement guidelines for Access Broadband over Power Line Systems

A 80/40m Direct Conversion HF Receiver with DDS VFO - Juha (OH2NLT) and Matti (OH7SV) have designed JUMA-RX1, an award winning 80/40m direct conversion HF receiver with highly accurate direct digital synthesis VFO. The receiver is very compact, because it constructed using surface mount components. No coils need to be wound to construct this receiver!

Rainbow Antenna Analyzer - A small and inexpensive measurement device designed to determine antenna performance across the amateur bands through use of automatically collected SWR readings