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Antenna design program for Quads, Yagis, Inverted Vees, J-poles, Trap Dipoles and more for MS DOS.

Makers of the Xforce Amplifier

Freeware Windows QSL card printer software. This tool will let you create you own QSL cards importing pictures and customizing colors and other cards aspects. Print directly to your ink-ject or laser printer. Runs on windows systems by wb8rcr

HF amplifiers manufacturer maker of HF-2000 RF power amplifier

A new tronics company, antenna maker, HF vertical antennas, vhf antennas, cb antennas

Makers of motorized antennas covering 6 to 160 meters

shows time zones around the world a well as the time at locations of your choice.

Daiwa Industry, maker of power suppliers, coax cable and antenna switches, power meters, SWR meters, DC-DC converters

Makers of the AlfaSpid RAS and RAK Rotators

An interesting article about co-linear or collinear antenna building, by Karl Shoemaker, AK2O

MorseMaker is an up-to-date replacement for the Morse Machine shown further down this page. It has been re-written using a different programming language and is now entirely 'stand-alone' requiring no run-time support files. This version also works with Windows XP and can use the soundcard but please note that, unlike its predecessor, it does not split the alphabet into smaller 'learning' blocks and does not incorporate the Morse reader.

SPE Makers of RF power amplifiers like Expert 1K-FA Expert 2K-FA

Expert Electronics LLC is a manufacturer of modern and compact SDR transceivers. EE develops and produces modern radio-electronic devices based on SDR (Software Defined Radio) for radioamateurs and professional applications. Makers of popular SunSDR models and SunSDR-MB1 transceivers

Maker of QRP Kits, QRP CW receiver and transmitters, audio CW Filters, antenna tuners, dummy loads, and morse code practice oscillator

A good overview article on power supplies by Karl Shoemaker AK2O of the Spokane Repeater Group

Makers of universal digital rotor controllers including wireless controllers

Maker of optical spectrum analyzers, digital oscilloscope, digital power meters and more test equipmente related products

Makers of oscilloscopes, spectrum analyzers, frequency counters, power supplies and more testi equipment products

Ham radio manuals in italian and english for several makers and products

Test equipment maker, digital oscilloscopes, generators and counters, multimeters, logic probes testers and more

This page presents a curated list of individuals who have made significant contributions across various fields while also being active amateur radio operators. For instance, Dr. Joseph H. Taylor, co-winner of the 1993 Nobel Prize in Physics for the discovery of binary pulsars, is recognized for developing the _WSPR_ and _WSJT_ weak signal mode software. Similarly, Wilson Greatbatch, inventor of the cardiac pacemaker with over **150 patents**, is featured. The resource details the diverse backgrounds of these hams, from Professor Donald H. Menzel, an astrophysicist at Harvard, to Hiram Percy Maxim, often called "The Father of Amateur Radio," who also pioneered in the automobile and aviation industries. King Hussein of Jordan, JY1, is noted for his active participation on 20 meters, engaging with fellow amateurs like Pat Kilroy, WD8LAQ. Other entries include Arthur M. Young, designer of Bell Helicopter's first model, and Marlon Brando, KE6PZH/FO5GJ, known for operating from his private island in French Polynesia. Peggy Sue Gerron-Rackham, K5PSG, gained her license after a special event station, demonstrating the hobby's broad appeal.

Palm radio palldes, german maker of popular Mini-Paddles, small keys and mini bugs

Maker of filters, oscillators, cristals Coils, Toroidal Inductions, Solenoids, Bifilar wound Solenoids, Trifilar Solenoids and Transformers Located in Kansas City, Missouri

Consumer solar power products, portable solar panels maker, Solar Mini Panels & Control Electronics.

Ham radio shop in South Salem, NY, dealer for Alinco, LDG, Cable X-perts, Jetstream and several antenna types and makers

Software defined radio products. Maker of AFEDRI SDR a direct sampling Software Defined Receiver by 4Z5LV

Amateur radio kits. Makers of the WinKeyer, their goal is to keep homebrewing and kit building alive.

An ARRL article collection about influence of radio frequency with pacemakers and other similar medical devices.

Spanish makers or signal generators, spectrum analyzers, testers

This version of the broadband hexbeam is based on the work of Hunt G3TXQ, HB9MCZ, and Shoemaker K4KIO. EZNEC model is based on a wider element spacing than the version published in QST by K4KIO

HF Linear Amplifiers, maker of the HAL600 Atlantic atomatic HF Amplifier

All Digital Transceiver makers of the ADT-200A by HB9CBU

Nuand id the maker of bladeRF - the USB 3.0 Superspeed Software Defined Radio, 300MHz - 3.8GHz RF frequency range Independent RX/TX 12-bit 40MSPS quadrature sampling

Condenser company, maker of electronic components like capacitors, condensers

Makers of the The Polar Explorer transmitter, which operates on 9 HF bands from 160 through 10 meters and is capable of 500 watt peak output power on SSB, CW, AM, FM and RTTY. It is intended to be used in conjunction with a transceiver.

The Information Source For Makers, Experimenters, DIY, Home Brewers, Restorers, and Amateur Radio Operators

Makers of QRP HF General Coverage Transceivers you can build. The Home of BITX transceivers, uBITX General Coverage Receiver-Transmitter. A general coverage, 10 watts HF SSB/CW transceiver kit with features you NEED for operating ease, convenience and versatility. It works from 3 MHz to 30 MHz, with up to 10 watts on SSB and CW, with a very sensitive receiver.

Gridmaker takes your ADIF-file and searches for all the grids on the specified band. It then makes files for use in DXAtlas

Amateur radio antenna maker with online shop based in Brazil

Makers of SkyPiRx and SkyPi-40 anateur radio kits and SDR for Raspberry Pi

Maker of bladeRF usb superspeed SDR Software Defined Radio

Makers of the worlds smallest automatic solid state HF amplifier Expert 1K-FA, Expert 2K-FA and Expert 1.3K-FA

Maker of small and compact multiband QRP UltraLight Magnetic Loop Antennas and UnUn transformer for end-fed multiband antennas

Preprinted from the 1997 ARRL Handbook for Radio Amateurs. Thermal Effects of RF Energy, Safe Exposure Levels, Cardiac Pacemakers and RF Safety, Determining RF Power Density

Laboratory 599 makers of the DISCOVERY HF/50 MHz SDR Ultra-compact Trasceiver.

This is a detailed, technical piece, intended mostly for makers and more creative activators, who enjoy building and using their own tools on the summits. A multiband portable antenna tuner supporting 10W, small and light, suitable for SOTA operations

Commercial VHF UHF antenna maker based in Brazil

The Waterway Net, sponsored by the Waterway Radio and Cruising Club, is dedicated to enhancing amateur radio communications for recreational boaters. Meeting daily at 0745 ET on 7.268 MHz LSB, the net focuses on safety and weather updates, providing a vital link for live-aboards and cruising boats to stay connected with families and friends. Position Reports and Float Plans are essential components that ensure safety for offshore passage makers. Established in the early sixties, the Waterway Net is one of the longest-running nets in amateur radio history. Open to all amateur radio operators with a General class license or higher, it encourages participation without requiring WRCC membership. Newcomers are advised to listen initially to understand net procedures before checking in. In emergencies, FCC regulations allow anyone, licensed or not, to use any frequency to call for help, with the 20-meter frequency of 14.300 MHz available for emergency assistance approximately eighteen hours a day.

HyEnd is a dutch amateur radio antenna manufacturer. Makers of the popular HyEndFeed Antennas, produce Baluns, bandpass filters and selle Line isolators, coax cables and connectors.

Amateur radio SDR Receiver and Transceiver manufacturer , makers of the Silphase R1 an innovative HF receiver with high performance real-time spectrum scope.