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Multi-loop Rectangles and Compact Arrays - VHF antenna array that packs a lot of gain into a small volume article by N2DT

Core Baluns - About core baluns, measurementes, basic theory and calculations

4:1 Dual ferrite bead balun - The Dual-Ferrite-Bead 4:1 HF Balun, some preliminary measurements

A Mini Primer on SWR Measurements - What Does a Low or High SWR Mean? Relation between SWR and antenna efficiency by WB6FRZ

QSL - Proper postal addressing - Proper postal addressing ensures quick and efficient handling of your QSL

9W2PJU - Malaysian Ham Radio Station - amateur radio / ham radio full disclosure

KB3BHL Sussex Amateur Radio Association - Our mission is the promotion and advancement of amateur radio activities within our county and surrounding areas.

Northeast Iowa Radio Amateur Radio Association - The Northeast Iowa Radio Amateur Association has been serving Blackhawk County and the surrounding area since 1928

LCARS - The Lake Country Amateur Radio Service consists of interested amateur radio (Ham Radio) operators from the Virginia and North Carolina counties that surround Kerr Lake and Lake Gaston. Our members have a variety of interests and backgrounds, bringing rich and varied experiences to the club membership.

Down East Hamfest - Annual Down East Hamfest is an ARRL Sanctioned Hamfest

WE-030A Antenna Analyzer - Small and simple to use, this antenna analyzer can speed and ease the tuning and adjustment of HF antennas. It measures the fundamental parameters SWR and return loss.

Ottawa Region APRS Group Canada - This site is dedicated to co-ordinating the APRS activities in Ottawa, Ontario, Canada and the surrounding region.

Digital Radio Mondiale - About DRM, the DRM standard, emission types, upfrading your old HF RX to DRM

2M Programmable Fox-Or Transmitter - The 2 metre fox-or transmitter is a small low power transmitter which mounts in a small plasic pipe and runs off two AA batteries. The board measures just 12mm by 70mm.

How to Measure Receiver Sensitivity - Testing an Elecraft K2 sensivity using a signal generator, headphones and an AC Voltmeter

Maldol HVU-8 antenna - Real life experience with the Maldol HVU-8 antenna by KI6YRD

Cushcraft R7 repair and tests - F5DQK repairing and swr measurement tests of a Cushcraft R7 Antenna

Gap Titan dx SWR tests - GAP Titan DX Measurements of SWR report by WT5L

ICM Components - ICM Components is a company supplying Semiconductor & Passive Components, stocking most surface mount packages in I.C & Capacitors.

Jaycar Electronics - Jaycar electronics offers electronic kits, components, semiconductors, enclosures, batteries, PMR, transceivers, UHF CB Antennas

PTL Test Equipment - Your best source for new & reconditioned test and measurement electronics in USA

NFM - noise figure measurement - NFM (for Noise Figure Meter) is a software application to assist Noise Figure measurement. NFM implements the method of Agilent application notes AN 57-1 and AN 57-2 for noise figure measurement, but with the addition of an adjustable attenuator after the noise source and between the DUT and instrument.

G3TXQ Milliwatt meter - Meter capable of accurately measuring low levels of RF power

Digital Wattmeter - 300nW to 30W - The digital wattmeter project was created for the purpose of measuring power in the range of 300nw to 30w.

QRP SWR Meter - SWR meter for low power output measurements, dedicated to QRP operations