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A radio's transmitting power can be concentrated along the horizon by use of a GAIN antenna. Although you may still be transmitting with four watts of power, your effective radiated powerwill be greatly increased. This table shows the effects of antenna gain on a transmitter with 4 watts of transmit power.

Using our components you can build a rotating tower with greater capability than 3-4 static towers. A rotating tower allows common rotation of HF stacked arrays, VHF and UHF arrays, and antennas mounted at optimum heights. Component design also allows tower shunt loading and end support for wire antennas

This program allows both great-circle (polar) and rectangular projections of the world. The great-circle map is centered on any specified latitude and longitude (the "home" location). The rectangular projection is shown with the home longitude in the middle of the screen.

The lists are the most comprehensive compilations of frequencies for the Greater Cleveland area

A site dedicated to portable operation in the great outdoors!

A web site dedicated to hex beam homebrewing. The hexagonal beam has become a wildly popular antenna. It is a directional antenna that provides great performance and does not require a full scale, expensive tower.

New Mexico's largest Amateur Radio gathering. Lots of buying and selling of ham radio equipment and great activities.

This site is dedicated to mobile amateur radio operators, old and new alike. Whether you are into HF, or VHF operation, the information presented will increase your enjoyment of our great hobby.

Personal review of the Yaesu VX-6R handheld transceiver

Radio Society of Great Britain

Draw static response time of an audio system. Originally intended for loudspeakers tests, is also a great tool for looking at microphone equalisation.

NHARC serves the Amateur Radio community in the greater Pittsburgh area USA.

Filled with info about Ham radio and frequency listings as well as great links.

The RAGS web site filled with information about the club and its happenings, as well as other ham info in the Syracuse area NY

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.

Lightweight keys and paddles may be great for backbacking, but what if all you want is the darn thing to stay reasonably still on the desk?

A site dedicated to the Yaesu FT-817 and FT-817nd, The great little transceiver made by Yaesu. A web site full of FT-817 videos and articles

Accurate calibration of your receiver and sound card is necessary for good results with the weak signal modes in use at LF. Modern receivers with master oscillators that are synthesized to provide all conversion frequencies greatly simplify the process. This article describes a method of making the necessary measurements and adjustments to an ICOM R75 receiver and a sound card, using the ARGO software

Operating magnetic loop antennas requires careful consideration of RF safety, particularly regarding near-field magnetic field intensity. This resource presents calculations for magnetic field strength (H-field) at various distances from a magnetic loop, emphasizing that the H-field is significantly higher than the E-field in the near-field region due to the inductive nature of the radiating element. It provides specific formulas and examples for determining safe operating distances based on power levels and loop dimensions, crucial for compliance with RF exposure limits. The analysis compares calculated H-field values against FCC and ICNIRP maximum permissible exposure (MPE) limits for controlled and uncontrolled environments. It demonstrates that even at QRP power levels (e.g., 5W), the H-field can exceed MPE limits within a few feet of the antenna, necessitating greater separation distances than often assumed for electric field considerations. The practical application of these calculations helps amateur radio operators configure their stations to ensure personnel safety and regulatory compliance when deploying compact, high-Q magnetic loop antennas.

Hams have been putting stations in their cars since the Twenties. Today, there is great satisfaction in facing the challenge of installing a transceiver in our small cars and pick-ups, using somewhat inefficient antennas

Great Circle Map for Linux, available for Debian, freeware by SM3GSJ

A great resource for new Hams, those who want to become new Hams, or those who just need a refresher. The site offers some good video courses to help prepare for the exams.

Alexander The Great AWARD from Northern Greece Contest Team

Serving Nebraska's oldest city, the Bellevue Amateur Radio Club provides public service support and emergency communicaitons services to the Bellevue and Greater Omaha area.

Dipoles at the correct height are not only stealthy antennas, they work great

GCARA is a general interest amateur radio club intended to promote amateur radio, electronics education and fellowship through amateur radio in the Greater Cincinnati Tristate - Indiana, Ohio and Kentucky area. The club service area lies within a circle having a radius of 25 miles from downtown Cincinnati.

6m/2m/70cm Yagi Antenna Built from Old TV Antenna This turned out to be a great little antenna. It works the 6 meter, 2 meter and 70 centimeter bands. You can use one common feedpoint or two seperate feedpoints depending on how you would like to connect this antenna to your transceiver.

The Peekskill / Cortlandt Amateur Radio Association, Inc. (PCARA) is a Volunteer Non-Profit Community Service Organization Serving the Greater Peekskill / Cortlandt Area of Westchester and Putnam Counties in New York State. PCARA operates three voice repeaters in the Northern Westchester / Southern Putnam County region of New York State.

Tape measurement yagi. The longest part is 530 mm, easy fit to your backpack. Very easy and fast deploy. Great for SOTA and portable operation. Can be used in horizontal or vertical polarization. Based on DK7ZB design

How can the current "flowing" out of the top of a mobile loading coil be greater than the current "flowing" into the bottom of the coil?

ladder-line is great - extremely low loss, even at high SWR. However, many hams refuse to use it because they are afflicted by common misconceptions

A free PDF from NASA about cubesat. Basic Concepts and Processes for First-Time CubeSat Developers. A great introduction document dedicated to Cubseat developers.

Gsbarc is the home of the great south bay amateur radio club,serving the community of babylon township through pubilic service.

Provider of supplemental emergency communications for the Greater Cumberland, Maryland tri-state area, and promoter of amateur radio in the community.

Greater Bridgeport Amateur Radio Club helps to provide vital Emergency Communications through amateur radio to Southern Fairfield County and the Derby area.

Not-for-profit, Michigan fraternal organization.

Remotely-Operated 1200 Baud AX.25 Narrowband Packet Radio and APRS on a Baofeng UV-5RA and Raspberry Pi 2

The Maple Valley Amateur Radio Club (MVARC), an ARRL Affiliate club, is a group of amateur radio enthusiasts in the greater Maple Valley area who meet and engage in activities to further the advancement of this hobby for the good of ourselves and the community.

The Hexbeam is a great little antenna! It should be high on your list of options if you want a design that can be multi-banded, exhibits useful gain and directivity, is very lightweight, has a small turning radius, and which lends itself readily to Do It Yourself construction.

The David Sarnoff Radio Club is a general-interest amateur radio club serving the Greater Princeton, NJ area.

Six meters is a great band for home built Yagis. The elements are reasonably small, but not so small that building tolerances are critical. With careful construction and detailed instructions, it is certainly feasible to build no-tune Yagis up to 432 MHz.

Serving Greater Waterbury

Dedicated to the Preservation and Enjoyment of Vintage Radio and Wireless Equipment Serving the greater Portland, Oregon area

CMARC has been serving the greater Columbia and Montour region for over 25 years.

Great pages about EME, including how to get started in EME

A great page about RTL-SDR and GNU Radio with Realtek RTL2832U [Elonics E4000/Raphael Micro R820T] software defined radio receiver.

Jose B Rivera, N2LRB, shares his initial experiences with the Icom IC-7300, recounting a shift from skepticism to appreciation for the transceiver. He details how the radio's impressive Sherwood Engineering test results, ranking it #12, significantly influenced his decision, especially considering its competitive price point against higher-end options like the Elecraft K3s. The review highlights the IC-7300's strong receive capabilities, a key factor in N2LRB's purchasing decision, and notes the advantages of its SDR architecture for future updates. He describes the straightforward setup process, from unboxing and connecting PowerPole connectors to making a first contact with N0HQ, a special event station. N2LRB expresses satisfaction with the radio's clear audio and ease of tuning, even if the pan-adapter's utility for his operating style remains to be fully explored. He concludes that the IC-7300 offers exceptional value, providing SDR features and receive performance comparable to more expensive rigs at half the cost.

Formed in 1987, serve the west part of Cambridgeshire that straddles the valley of the river Great Ouse and was the old county of Huntingdonshire. This includes the market towns of Huntingdon, St Neots, St Ives and Ramsey.

A CW sidetone bypass for the NESCAF audio filter, a small and low cost circuit that works great.

This simple beverage ntenna is easy to make, easy to setup, and it offers great RX performance.