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This Microphone comparison article summarizes the test results of two popular ham radio microphones the ElectroVoice RE27 and Heil PR781

WebLog for Amateur Radio, Computers, Technology, not my personal life because...who really cares about my personal life? by Justin Kates Lewes, Delaware, United States

Amateur Radio Youtube Channel with some picture slideshow compilations by VK5SW

Summary, tutorial about the basics of what is a waveguide and the basic waveguide theory.

Anderson Powerpole connectors are becoming the standard for Raynet ARES and RACES groups as well as many Ham radio shacks round the world. This recourses page will give you a guide to Anderson Powerpole connectors in the radio shack.

Listen to live radio scanner feed of Dallas Police 1 Central - 2 North East

The Easton Amateur Radio Society's web site Easton, Maryland

The Ontario Science Centre Amateur Radio Club (OSCARC) provides volunteer support to the Amateur Radio (ham radio) demonstration station at the Ontario Science Centre in Toronto, Canada.

Taken from April 1935 issue of QST page 60 where there is a short article on the origin of 73

A very popular method of making a short dipoles resonate at a given frequency. This type of antenna is suitable for single band, narrow bandwidth use.

Plans for building your own 3-element beam for use on 6m.

Stocks some NOS Heathkit parts

EasyEDA - Web-Based EDA, schematic capture, spice circuit simulation and PCB layout Online.

In italian language, ham radio tales

The AT-AUTO automatic antenna tuner handles 1.5kW CW operation, employing stepper motors under microprocessor control to precisely position a roller inductor and air-dielectric variable capacitor, avoiding relay-switched discrete components. This design choice prevents loud relay clacking and burning contacts, a common issue with competing products. The tuner features auto-retuning capabilities and receives periodic firmware updates, ensuring continuous improvement and added user-requested features. Its companion product, the _CX-AUTO_ coaxial switch, also features an embedded microprocessor controller. It enables selection of 1-of-8 coaxial outputs via a serial data interface. When integrated with the _AT-AUTO_, the tuner can associate specific coaxial outputs with amateur radio bands, automatically commanding the _CX-AUTO_ to select the correct antenna when the operator QSYs to a different band. Don Kessler began designing the AT-AUTO in 2005, with its debut at the 2006 Dayton Hamvention. Kessler Engineering also offers custom RF product design and electrical engineering consulting, specializing in Class-E RF amplifiers.

Interesting PDF Document on Lightning and Surge Protection

LA8W LN8W, Norwegian Contest Club

Antenna gain and directivity explained in this article at radio electronics antenna pages

Home page of the Siskiyou County Amateur Radio Association located in northern California; Club Call Sign is K6SIS.

How to homemade antenna to be used with a handheld on the aircraft band to locate noise sources

For UK resident amateur radio operators. Sell unwanted Ham gear for free

Condenser company, maker of electronic components like capacitors, condensers

Tool Kits, Tool Cases, Datacom Tools, Telecom Tools

The WB5RVZ Genesis Radio G40 build log documents the construction of a 5W QRP 40m SDR transceiver kit, detailing each phase of assembly from power supply to RF filtering. It provides specific component lists, parts placement diagrams, and testing procedures for stages like the local oscillator, Tayloe detector, and RX op-amps. The resource highlights discrepancies between documentation versions and offers practical advice for builders, including a "virtual build" approach to preemptively address potential ambiguities in component identification and placement. It also addresses a specific "VK6IC Fix" for early board revisions, involving trace cuts and jumper wires for improved performance. The build log presents measured voltages and expected current consumption for various stages, such as the 4.9-5.0 Vdc on the 5V rail and under 100mA for RX current. It outlines critical adjustments like image rejection tuning, a common procedure for direct conversion receivers. The resource also includes practical tips for handling components like the 2N3866 transistor and its heatsink, emphasizing pre-assembly. It details the winding of two 1.45 uH toroidal inductors on T50-6 cores with 17 turns of #20 AWG wire, crucial for the RF path.

Amateur Radio DXpedition to Huang Yan Dao (Scarborough Reef) in 1995, includes slideshow and dxcc country information

Dealer of digital and analog panel meters Products include portable test equipment, oscilloscopes, recorders and temperature sensing equipment

N8VI\'s powerpoint on satellite keplerian elements.

Listen to live police radio scanner from Dallas

Installing the Cumbria Designs X-Lock VFO Stabilizer, and Improving The TR7 Audio Quality

Suburban amateur radio repeater is a wider coverage machine with six receiver sites in the chicago metropolitan area.

A youtube video instructions on how to replace, the Select knob. Very often this know wobbles after some years of usage and in this video is well documented all passages needed to replace the knob.

A nice guide to make basic contacts in morse code with a particular reference to SOTA operations by VK3BQ

Simple QRP projects, 10m, 6m, WSPR beaconing, sub-9kHz and other random stuff

The Delaware Valley Radio Association is a non-profit 501(c)(3) organization devoted to the promotion and preservation of the amateur radio hobby. The club is comprised of amateur radio operators and their families.

A page dedicated to servicing and building a 10 meter band moxon Antenna

Yaesu Certified European Distributor and Authorized Service Center based in Italy

A simple dipole for 40m band feeded with 450-Ohm openwire feedline includes MMANA Gal files to download

MB7ICL Echolink Node Clacton on Sea, Essex The Gateway to the world

Hundreds of ham radio operators in the US Midwest rely on regional hamfests for equipment sales, technical presentations, and social interaction. This Yahoo Groups forum serves as a dedicated platform for promoting these events, allowing organizers to post announcements and attendees to find information on upcoming gatherings. The group's focus is specifically on hamfests within the Midwest, facilitating local and regional participation in these important amateur radio activities. The platform enables members to share details about various hamfest activities, including flea markets, vendor exhibits, and license examination sessions. While the group primarily functions as an announcement board, it also supports community discussion related to event planning and attendance. The resource helps hams locate nearby events, fostering engagement within the Midwest amateur radio community.

The **Escort** series Tactical Carrying System provides robust protection and enhanced portability for popular HF transceivers, addressing the need for secure field operation and transport. These systems, designed for models such as the Yaesu FT-857D/891, FT-991, FT-817/818ND, and Icom IC-706/703/7000, IC-7300, feature military-grade construction with front panel protection and versatile carrying strap attachment points. Operators can confidently deploy their rigs in various environments, from SOTA activations to casual field days, knowing their equipment is safeguarded against bumps and impacts. Beyond tactical carriers, Portable Zero LLC also produces the **Sherpa Pack** for the Yaesu FT-817 and the Field Power 12 and Field Power 3 Battery Cases. These accessories complement portable operations by providing essential power solutions and additional carrying options, facilitating extended off-grid activity. Established no later than 2013, Portable Zero LLC manufactures its products in the USA, leveraging CAD design and CNC precision laser cutting for consistent quality. The company's commitment to enhancing portable amateur radio operations is evident in its specialized product line, available in finishes like Black Texture and OD Green.

A device to allow the transmission of Morse on VHF/UHF FM-only transceivers by VK3YE

The official Summits on the Air discussion group.

Unequaled surge suppression for indoor/outdoor/military and custom needs.

Introduction to NVIS antenna and NVIS propagation. A simple NVIS antenna can be constructed as shown in this article

Noise Canceller kit originally developed about 1989 by G4WMX and GW3DIX and improved by DK9NL and DG0KW.The VK5TM Noise Canceller is another version of the design, with the HF Vox circuit removed and a couple of other minor changes, including the use of SMD JFETs and a double-sided pcb.

The Hamilton Amateur Radio Club operates the VE3NCF repeater, 146.760- and 444.075+MHz. It is open for use by all Hams

Over 100 trained amateur radio operators comprise the New York City Amateur Radio Emergency Communications Service (_NYC-ARECS_), an auxiliary communications service dedicated to providing vital radio links during local, regional, or national civil emergencies. This organization supports governments, civil-preparedness, and relief agencies in situations such as power failures, explosions, fires, floods, earthquakes, or terrorist activities. Their operational readiness is critical for maintaining communications when conventional infrastructure fails, leveraging the resilience and adaptability of amateur radio. NYC-ARECS actively participates in the NYC Office of Emergency Management (_OEM_) Partners in Preparedness program and is a member of DHS FEMA's National Preparedness Coalition, demonstrating its integration into broader emergency response frameworks. The group's activities include regular training, maintaining operational readiness, and deploying communication assets across the five boroughs of New York City. Their efforts ensure robust, independent communication channels are available to support disaster relief and public safety operations.

Twenty-four repeaters, including D-STAR and Fusion systems, are maintained and operated by MARCA Inc., primarily located on Arizona mountaintops and around the Phoenix metropolitan area. The organization, holding the callsign _W7MOT_, facilitates a wide range of amateur radio activities, such as ARRL Field Day events near Forest Lakes, Arizona, and participation in ARRL FMT contests. Members engage in antenna experimentation, construction, and maintenance trips to repeater sites. The club's interests span diverse topics, including HF voice, digital modes like _WSPR_, _WSJT-X_ (FT8, FT4), and CW, alongside DXing, MESH networking, and EOC operations. It supports technologies from SDR radio building to antique radio restoration and computer-based operations like Echolink, fostering a Single Board Computer (SBC) and Raspberry Pi group. Monthly meetings, held on the third Tuesday, feature business discussions and guest presentations, with informal summer gatherings and an annual holiday dinner in December. Monthly VE testing sessions for Technician, General, and Extra Class licenses are conducted by Ray Vasquez, K4RMV. Post-meeting discussions often cover specialized interests such as repeater operations, technical topics, D-STAR, SDR, APRS, Fusion, and Raspberry Pi projects.