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Exams, Club and Other Information, bullettins, classes and trainings

Extend the range of wireless network or connect to other wireless networks in neighborhood with your own wifi antenna.

Over 130 years after its inception, Morse Code remains a fundamental skill for many amateur radio operators, enabling efficient QRP operations, DXing, and contesting. This resource provides an in-depth look at the **Koch Method** of Morse training, a widely adopted technique that emphasizes high-speed character recognition from the outset. It details how this method can significantly accelerate proficiency, moving beyond traditional, slower learning approaches. The site also delves into the rich history of amateur radio, presenting articles such as "Radio on the Rio," which chronicles local ham activity in Socorro, New Mexico. Another piece, "The Russian Woodpecker," recounts the Cold War-era efforts of hams to counter Soviet over-the-horizon radar interference on the HF bands. Furthermore, the resource explores the fascinating intersection of ham radio and radio astronomy, highlighting the direct lineage between amateur experimentation and the development of modern radio telescopes like the **Very Large Array (VLA)**. It also includes an introduction to the 6-meter band, often called "The Magic Band," detailing its unique propagation characteristics and suitability for no-code licensees seeking long-distance contacts.

PalmProp is a software for PalmOs dedicated to the forcast of HF radiowave propagation by f5hla

Why all the mystery surrounding baluns ? To use or not to use baluns

A home made project, scan and monitor the 2.4 GHz band using a common MMDS downconverter.

Construction of attenuator, suitable for fox hunts at 144mhz

A K9AY loop antenna project done with Far Circuits pc boards for the antenna switch and bandpass filter and preamp by K7SFN

Mounting on Roof or at Ground Level? Why ground plane antenna works better at lower level.

The Findlay Radio Club was incorporated as a non-profit organization in the State of Ohio on June 9, 1956.

An article at NFARL web site about differences in setting up a half-square antenna versus a Loop Skywire by W4QO

FREE ham radio newsletter The K9YA Telegraph is in full-color and delivered to your computer each month as a PDF.

Resources for amateur radio astronomers, teachers, and students.

TenTec 1208CY 10/50 MHz Transverter modification by DF9CY

The California Polytechnic State University Amateur (Ham) Radio Club (CPARC) has a long tradition of communications service on campus and in the community of San Luis Obispo. The club was founded in 1947, making the Cal Poly Amateur Radio Club the second oldest club on campus

A Compact and efficient multiband beam antenna based on a Modified W8JK Array by K5LJ

Over 26 years of public service in Brandon FL

based on an FT-1000MP Reflector discussion with Bill Heinzinger, W9OL, 15/16 November 2002

Flash crystals, Feakin' beacon keyer, beacon attenuator

This page contains a map of Amateur Radio Russian Prefixes.

Article by VU2GT about VHF antennas, how to evaluate performances and models.

Repairt a Heathkit SB-220 Linear Amplifier with a bad Plate Voltage meter

Chart showing how SWR effects how much power you actually radiate from your antenna.

Heathkit Manuals

Amateur Radio operators, volunteers for Emergency Service, in Portland, Oregon, and other suburban cities and towns in Multnomah County

The Packet Radio beginners guide to packet radio operating by Buck Rogers K4ABT

SARA provides emergency communications for the City of Saratoga as well as for community events.

The antenna described here is a direct-connect dual-rectangle beam for use on 70 cm between 440 and 450 MHz

Polish amateur radio dealer for Yaesu Icom Motorola Diamond MFJ Daiwa Lafayette

EggsHam is a PalmOS application that generates (and grades) _practice_ amateur radio licensing exams. It is for people interested in obtaining an amateur radio license in the US, who want to practice for the Technician, General, or Extra written exam.

Amatuer Radio QSL Cards. Full Color QSL and Eyeball Cards

Article on tubes and their usage in power amplifiers design. Explain failures of tube in RF power amplifiers, a common problem in the SB-220 SB-221, TL-922 and other amplifiers.

Your beginner's guide to shortwave radio, include an up to date blog and news about products and events.

RS41 Tracker is a software running on Windows that it is able to decode telemetries generated by Vaisala RS41 radiosondes. Used with a FM radio receiver it allows to display radiosonde positions on a map.

WAU Worked all Ukraine award by UT4UW

The European DX Foundation (EUDXF) is the first and only all European Foundation to support DX activities. It is a non-profit organization established in 1986 in the German town of Bad Bentheim

Foothills Amateur Radio Society

Firsts pictures of Icom IC-9100 taken at Tokyo HamFair 2009

The safe RS232 CAT interface and PA buffer for Elecraft K2

Radio Clock listens to radio time signals from your radio and corrects the time on your PC clock

The Western Washington DX Club is an organization of Amateur Radio (HAM) operators who have a special interest in DX or distance communications

A bycicle ham radio station setup, with full band coverage

A list of free to download CPS Motorola radios programming software. GM3188, GM3688, GP3188, cp1600 cp1300 and some more.

In his back office section, ON4SKY, initiates in a few articles the beginners in the art of QSLing and award chasing.

A hombrew QRP transceiver for 40 meter band with many pictures, circuit and sound recording of some QSOs made with this Rig consisting of 5 transistor and one chip.

Kenwood TS-450S/TS-690S MARS modification video

Manufacturing distributor of infrastructure products for the telecommunications industry; antenna mounts, ice bridge, cable ladder, ground bars, weatherproofing, exothermic, safety equipment.

Radio Communication Equipment store in Wien Austria

Sams continues the tradition with the publication of new manuals every month, covering the latest in Televisions, including HDTV, Projections TVs, and coming soon, LCD monitors.

With VHF Hamradio Software