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Server allowing operation of the Winkey USB by K1EL with any Linux program with UDP keyer capability.

Yaesu Vertex VX-170 FM 2 meter handheld specifications by Universal Radio

Amateur TV, Satellite TV Equipment, Broadband Via Satellite, Weather Monitoring

CB resource site in Quebec

Military radio sets for land, sea or air from new current production, unused or rebuilt u. s. military surplus and their accessories and spare parts since 1946 your reliable one stop source.

This resource compiles claimed scores, often referred to as "rumor scores," for numerous amateur radio contests, providing a historical snapshot of competitive activity from 1993 through 2007. It lists entries for prominent events such as _CQWW CW_, _ARRL Sweepstakes_, _IOTA Contest_, and various _NAQP_ events, categorized by year and contest. Each entry typically includes the contest name and the month/year of operation, allowing users to quickly navigate to specific contest periods. The site also references the _3830 Web Page_ on Contesting.com as the primary submission portal for these claimed scores. The collection offers a unique perspective on contest participation and performance trends over more than a decade, preceding the widespread adoption of real-time score reporting systems. While not official results, these rumor scores provided early indications of top performers and overall activity levels for a wide array of HF and some VHF contests, including _ARRL 10M_ and _CQWW VHF_. The historical data can be useful for analyzing past contest popularity, identifying consistently strong operators, or simply reminiscing about earlier competitive eras in amateur radio.

Professional CB Radio Repair. Have repaired CB Radios and 10 Meter Radios for over 30 years

A Comparison of most popular Amateur Radio Digital Voice Systems DMR D-Star System Fusion presented by W9HPX Roland at the Charlotte Digital Radio Group in a comprehensive article about Digital Voice

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.

FMI provides superior solutions in the design and manufacture of frequency control devices including Voltage Controlled Temperature Compensated Crystal Oscillators (VCTCXO), voltage controlled crystal oscillator (VCXO), Temperature Compensated Crystal Oscillators (TCXO), crystal clock oscillators, high temperature oscillators, surface mount and crystal oscillator products, phase locked sources and more.

160 to 40 meters inverted L antennas projects

Synthetic guy ropes and accessories for antenna support systems

Ten-Tec Orion picture and specifications at RigPix

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.

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

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

Transferring Radio Frequency Energy from Your Transmitter to Your Antenna by Don Keith N4KC

Windows shareware November Sweepstakes Log program

Amateur Radio Youtube Channel with some picture slideshow compilations by VK5SW

Online shop for obsolete electronic components, tubes and semi-conductors

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

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.

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

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

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

The CQ World Wide DX Contest records page details the highest scores achieved in the CQ WW DX Contest across various categories and years. It systematically lists records for both SSB and CW modes, segmenting results by entry class such as Multi-Multi, Multi-Two, Multi-Single High, Multi-Single Low, Single Operator High Power, Single Operator Low Power, Single Operator QRP, Single Operator Assisted High, Single Operator Assisted Low, and Single Operator Assisted QRP. Each record entry specifies the callsign, the operator's callsign in parentheses if different, the year of operation, and the total score achieved. The data is further broken down by individual amateur radio bands, including 160m, 80m, 40m, 20m, 15m, and 10m, allowing for granular analysis of performance within specific frequency segments. The page also includes records for the "ALL" band category, representing cumulative scores across all operational bands. The presented records span from 1948 to 2025, providing a historical perspective on contest performance. This resource also references other CQ contests like CQ WPX, CQ WW RTTY, CQ WPX RTTY, CQ 160, CQ VHF, and WW DIGI, indicating a broader context of contest record keeping. It explicitly states that late logs are not included in the records, ensuring data integrity. The page is maintained by the World Wide Radio Operators Foundation, Inc.

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

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

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

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

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

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.

Stocks some NOS Heathkit parts

MMSTV help pages, describing how to setup and run this sstv program by Andrew O'Brien

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

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.

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

In italian language, ham radio tales

LA8W LN8W, Norwegian Contest Club

This article describes the development of two tunable antennas each consisting of three interconnected small loops and capable of providing excellent DX performance. The aerials are home-constructed, and located in a very small garden with a minimum of visual impact on the neighbours and are low enough in height to avoid the attention of UK planning authorities.

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

Listen to live police radio scanner from Dallas

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

Tool Kits, Tool Cases, Datacom Tools, Telecom Tools

The resource provides an interactive map interface for locating amateur radio license holders across the United States. Users can input a _callsign_, _gridsquare_, zip code, or street address to center the map, which then dynamically populates with station markers. This functionality allows for precise geographical searches, revealing the distribution of hams within specific areas. Upon initial search, the map renders with adjustable zoom and pan capabilities. A key feature is its automatic reload mechanism: after two seconds of inactivity, the map updates to display stations within the newly viewed area. This ensures that the displayed data remains relevant to the user's current focus, whether exploring a densely populated urban center or a more remote region. Further interactive elements include clickable gridsquare labels, which re-center the map, and a "Show gridsquares" checkbox for toggling grid line visibility. Clicking on individual station markers reveals a popup containing the licensee's name and address information, making it a practical tool for geographical station identification.

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