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

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.

G5RV Measurements - Measurements and characteristics of a G5RV Antenna, including effect of the transmission line as part of the antenna and contributes in a large way to it's multi band characteristics

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

Groundplane antenna - Short guide to build your own groundplane antenna, includes radial measurements fro warc bands

OH7SV Matti Hohtola Ham Projects  ^pop - The most modern QRP transceiver in 2004,Direct Conversion HF Transceiver with DDS LO, 50 ohm to 200 ohm HF wide band transformers, Wilkinson splitter for RX measurements, Windom baluns 2001/2004, Ferrite rod antenna for 80 meter, Magnetic Loop Antenna for 80 m, Mascot Switched PSU 9320 modification to 8A peak current, 150W MOSFET linear amplifier for 80m, 80 m HF SSB/CW Transceiver

PA3GIO DXpeditions: IOTApedition to Jersey - New IOTApedition: 10 - 15 January 2006

The PA2S 50 MHz Tape Archives - The PA2S Tape Archives. Many RealAudio sound clips of 50 MHz DX contacts, recorded during solar cycle 21 and 22.

Ameco - Text books relating to amateur radio (HAM radio), highpass and lowpass power filters, transmitter test loads (dummy loads), study tapes and disks to learn morse code, transceiver preamplifiers, antenna signal boosters.

Micro Coax Priority listing - Serving the defense, telecommunications and test measurement marketplace.

GPS Time Series - The Global Positioning System (GPS) is a constellation of 24 satellites which is used for navigation and precise geodetic position measurements.

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

ValueRocket Labs - Used electronic test and measurement equipment

Tucker Electronics - New and refurbished test and measurement instruments

Bertech - Distributor of ESD, kapton tapes, high temperature tapes, esd wrist straps, ionizers, ground cords, grounding devices, ESD gloves, esd finger cots, esd workstations, esd rubber bands, esd binders, esd bags, anti static glove, esd rubber bands, no clean solder paste, water soluble solder paste, finger cots, esd mats

Calright Instruments - Used test equipment, used electronic test equipment, refurbished test equipment and other pre-owned electronic test and measurement equipment to buy or rent.

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

CHU Canada - Institute for National Measurement Standards

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.

TCube - TCUBE is a combination of a Spectrum Analyzer and a Two Tone Generator, with optional quadrature outputs. It can be used for measuring the intermodulation behavior of an audio circuit, and as a general purpose tool

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