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MARCA - an amateur radio experimential and education organization in the Phoenix, Arizona area

VB2C VC2C VB2V VB2R

i4chy 10 ghz tropo eme rs

YRC the Yellowstone amateur radio club

This article presents an innovative homebrew antenna design utilizing surplus ladder line as a receiving antenna for HF and MF bands. The Ladder Line Antenna (LLA) transforms standard 450-ohm ladder line into a directional, bidirectional, or omnidirectional antenna system through different termination methods. The design, which requires minimal space and height, achieves 6-10dB front-to-back ratio on 40-160m bands using a 33-foot length. This DIY wire antenna project offers an efficient, low-profile solution for amateur radio operators, featuring broadband operation without ground radials and easy installation below fence height.

Web Site Of WB1GRB Located in Stamford, Ct, US.

Peninsula Amateur Radio Club - W4MT - Newport News, Virginia

A DIY aluminium push up mast project. The final mast includes 7 aluminium tubes with 6 cable clamps

A non profit organisation run entirely by volunteers to promote Low Power Radio.

An improved version of the audio interface commonly used to connect a computer soundcard to a transceiver\'s receive and transmit audio circuits

Personal web site

Serving the Community and Amateur Radio for over 50 Years

Putting the X7 at Science Festival 2004

Iambic and Straight key amateur ham radio CW Morse code practice oscillators for Android. This Android app gives you both straight and iambic CW Morse code practice key oscillators. Each key translates Morse code into English and CW prosigns in real time as you practice. Practice sending Morse code with a straight key oscillator. Settings include WPM, show/hide Morse code/text, choose sidetone 400Hz-800Hz. Adjust the WPM so that you can produce well formed DITs and DAHs at a comfortable speed.

The understanding of the A and K indexes will become a very important issue when one begins serious HF operation.

A homebrew radio transmitter project, based and inspired by the original 30 Watts input on 80 50 and 15 meters band transmitter by W11CP

The International Lighthouse/Lightship Weekend (ILLW) is an annual amateur radio operating event, typically held on the third full weekend in August, spanning **48 hours**. Originating in 1998 as the _Scottish Northern Lights Award_ by the Ayr Amateur Radio Group, the ILLW has evolved into a major international event. It encourages amateur radio operators to activate stations from lighthouses and lightships worldwide, fostering contacts and promoting maritime heritage. The event is characterized by its minimal rules, making it accessible and enjoyable for participants without the competitive pressure of traditional contests. Over 500 lighthouse entries from more than **40 countries** participate annually, contributing to August becoming recognized as "Lighthouse Month" within the amateur radio community. Unlike typical contests, the ILLW emphasizes participation and enjoyment over scoring or prizes for high contact counts. The site provides registration forms, entrant lists for upcoming years like 2026 and 2027, and reports from previous events, alongside historical context for the ILLW and related lighthouse activities such as the US National Lighthouse Week and the International Lighthouse Heritage Weekend.

Bruce K1XR Collins Radio Collection pages

VHF Yagi antennas with low Q, extending the boom.

Running 150 mW by OK0EN

The antenna described in this article is for 50 MHz, but the design can be scaled for any band, including VHF, UHF, or even the higher HF bands. The antenna is nothing more than a square loop of wire, approximately 30" (or ~76cm) per side. The loop is fed in the middle of one side, and the opposite side to the feed point has a gap in it.

An online multiple calculator of 16 impedance matching networks

K2Net is a remote operation windows software for the Elecraft K2, and allow remote control over internet or wi-fi networks by G4ILO

A multi band antenna for HF band capable to operate from 10 to 80 meters band depending on wire lenght loaded with a small inductance neat the feed end.

The Saratoga Amateur Radio Association provides emergency communications for the City of Saratoga, and promotes amateur radio in the community.

How-to decode and Display APRS Packets from WebSDR Audio using linux computer

KF6SPI Technical blog, audio, hifi, car and ham radio topics

This project is a USB Audio, Serial and PTT interface for rigs that does not directly support digital modes provided by applications such as FLDIGI, WSJT-X and JS8CALL. Plug these interface devices into your Windows or Linux laptop or Raspbian Raspberry Pi and you can send and receive digital tones to/from your rig and automate the frequency and mode control and PTT control.

Serving Akron, Ohio, Summit County and the surrounding area since 1981

How to convert the ICOM VHD base station IC-275D to 275H 100W 144-148Mhz

24915 KHz 12 mtrs band from JN63KR

Information about Starved Rock Radio Club and PRINCETON HamFest

The Badger Contesters is a club of like-minded hams who are interested in VHF/UHF/SHF weak signal communications. Our geographic focus is Wisconsin, however hams in Northern Illinois, Michigan's UP, and Eastern Minnesota are welcome to join us.

Capri island EU 31 iota referens

A group of Treasure Valley Hams have formed a group that is interested in experimenting with ballooning and using Amateur Radio and APRS to further our knowledge in communications.

Users review for the Kenwood TS-450S

There are some aspects in regards to mailing QSL letters to Russia which you should know

This site is basically for the begeners (SWL) of india. This site is supporting to digital communication for hams also.

Demonstrates the construction of a high-power 6-meter (50 MHz) amplifier, specifically designed for demanding modes like EME, TEP, and multiskip Es. It details the use of a _GU-43B_ tetrode in a grounded-cathode configuration, emphasizing the need for stabilized grid voltage and input capacitance compensation. The resource provides a comprehensive schematic, power supply design, and practical considerations for component sourcing, particularly for high-voltage and high-current sections. The builder achieved an output power of **1250 watts** with an anode current of 0.65 amperes and 3200 volts anode voltage. The article also covers the physical construction within a modified P6-31 enclosure, outlining the internal layout for RF and power supply sections, and includes photos of the completed unit. It highlights critical safety precautions for working with high voltages and reactive currents up to **20 Amperes** in the P-network.

Map of Argentina Locators

eHam reviews about Cushcraft X7 yagi antenna

New PA stage for good old Atlas 350XL HF transceiver

D-Star is being promoted as a new digital voice transmission mode "For the second century of Amateur Radio" - but does it really fit into the spirit of the hobby?

Amateur Radio Coaxial Antennas by G3TXQ

Reviews Summary for Cushcraft A3S at eham.net

Phased Spaced Active Whips and Broadband Loops by WA1ION

This calculator ask as input diameter, lenght turn and frequencu and will return L and Q