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Huge amount of relevant information you should know before building a tower

The Voice of America (VOA) website serves as a primary digital platform for its international news and information services, broadcasting in 44 languages. The resource presents a wide array of current events, geopolitical analyses, and cultural reports, reflecting a global perspective on news originating from the United States. Content spans various regions, including Africa, Asia, the Middle East, and specific country-focused reports from VOA's language services, such as VOA Uzbek, VOA Kurdish, and VOA Russian. The site features top stories, special reports, and sections like "All About America" and "VOA Explains," providing in-depth context on US-related topics and global issues. The VOA platform offers a continuous stream of updated news articles, covering political developments like government shutdowns, diplomatic relations, and international conflicts, alongside social and economic issues. It also includes sections for "Worth Watching" videos and "From VOA's Language Services," highlighting the breadth of its multimedia output. The content is designed to inform a worldwide audience, often presenting multiple perspectives on complex international events and US foreign policy, making it a significant reference for those monitoring global news and shortwave broadcast content.

An home-brewed morse code CW filter with a central frequency of 800hz and a variable bandwidth from 230hz to 26hz by F5RDH in french.

This page is dedicated to helping 850 owners keep their radios on the air

Welcome to Mike's radio collection, I collect and restore radio sets from the 1930's to the 1960's. I have built up quite a Collection of radios over the years, including Some rare Dutch and German sets.

Construction details and tests about a 2 elements cubical quad antenna for HF Bands (20,17,15,12 and 10m band).

WV7U's YC156 and 3CPX800 amplifier projects. Everything you wanted to know about using the YC156 or 3CPX800 in a ham radio linear amplifier. See pictures, schematics, test data, links, and more!

Links to US local emergency service local units

Choosing a vertical antenna. Buying guide to amateur radio HF vertical antennas by Bencher inc

Mediumwave, shortwave, and amateur bands QSL cards collection

A PC headset to Rig adapter. Include a circuit diagram and a full part list for the project

Few recordings of difficult qso's

An homebrew remote antenna switch by vk2zrm

by LA8OKA Martin Storli

Building an omnidirectionnal antenna for the 23 cm band, 1240 - 1270 Mhz

Theory of horizontal loop antennas, as discovered by G2PL using a lowered quad antenna and theorized by ZS6AKA

A 2W 80 meters transceiver assembled into a toaster case.

Radio Scanning in Australia

A 40/80 meters dipole made with two loading coils based on a project by IK1ZOY

Small and inexpensive homebrew HF radio 5W Output, CW SSB AM FM, DSP, Speech Processor, Sprectrum Scope, Watefall Display. mcHF is a small, home-brewed amateur radio project. Firmware is released as open source.

WM7D's FT100 resource page, dedicated to providing information about and resources for, the FT100

2,6 and 10 meters beacon located at Lake White, Ohio

FPP PIC programming software

Receiver converter that can be plugged to the backside of the Yaesu FT-817 battery powered portable transceiver

A page dedicated to 2nd generation of the FTdx9000 series transceiver Yaesu FT2000

Demonstrates a practical approach to improving Morse code proficiency through a curated selection of audio files. The resource offers downloadable MP3 files designed for CW practice, catering to operators aiming to increase their copying speed and accuracy. Content includes both standard words and specific amateur radio callsign groups, which are crucial for effective on-air communication. The files are organized to facilitate progressive learning, allowing users to select material appropriate for their current skill level. This collection supports the development of essential CW operating skills, particularly for those preparing for contests, DXing, or general ragchewing on HF bands. The _ON6ZQ_ site, maintained by _Christophe David_, also features information on his _Reverse Beacon Network_ skimmer and _SOTA2APRS_ feed, indicating a strong focus on active operating modes and digital integration.

The Folded Dipole is not used much amongst Radio amateurs, probably due to the fact that this antenna uses twice as much wire as a single-wire dipole.

60KHz to 60MHz. laboratory quality Vector Network Analyzer project

A vector graphic antenna analyzer project page by DC2WK demonstrating a project realized by DG7EAO includes, part list, schematics, and videos.

Roger, G3XBM, shares his extensive experience in **QRP** (low-power) amateur radio operation, detailing various aspects of transmitting with minimal power. The resource provides insights into VLF (Very Low Frequency) reception techniques and the construction of simple **crystal radio sets**, reflecting a foundational approach to radio experimentation. It includes links to external resources covering QRP clubs, online receivers, manufacturers, and technical references, offering a curated collection for enthusiasts. His page serves as a hub for those interested in the challenges and rewards of QRP, often comparing the efficacy of different low-power setups. The practical application extends to understanding basic radio principles through hands-on projects like crystal sets, which G3XBM has explored. The collected links provide a starting point for further research into specific QRP equipment or operating practices, drawing on G3XBM's long-standing engagement with the QRP community.

Plans and hex code for an RF wattmeter based on an Analog Devices AD8307 log amplifier.

Ebook by Akira Matsuzawa Tokyo Institute of Technology, Building blocks in RF system and basic performances, Device characteristics in RF application , Low noise amplifier design, Mixer design and Oscillator design

Homebrewed handheld RF powermeters for various sensors by DL5NEG

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

Raising large Yagi antennas can be a challenging project. A trolley system will make the job a lot easier

Codec2 is an open source low bit rate speech codec designed for communications quality speech at around 2400 bit/s. Applications include low bandwidth HF/VHF digital radio.

This Arduino library allow you to control various functions of Yaesu FT-857 through the use of CAT functions. This may work even with FT-817 and FT-897.

What is the Automatic Identification System (AIS)?

Using a full-size antenna and a reasonably sensitive headphone, this simple switching mixer will produce an amazing abundance of signals on 80m.

Download software for Kenwood Transceivers, like TS-990S TS-590S, TS-2000, TS-480HX or TS-480SAT

Tube databases in different languages

A simple simple sweep generator circuit design where the sawtooth is generated by the PNP transistor and a 555

Hammarlund HQ-129X Receiver, Heathkit C-3 Condenser Checker, Heathkit QF-1 Q-multiplier and more

The EggBeater Antenna web page by ON6WG F5VIF a web site dedicate to this VHF UHF antenna

This is a "techie" site, dedicated to presenting service manuals, parts lists, schematic diagrams and other information of value to restorers and technicians who try to keep these radios working

An Halo antenna for the six meters band in French

Two Delta-Loops in phase. The purpose of this article is to propose an antenna with a high gain, a high efficiency and a very low price that is easy to build for any frequency.

Best audio settings, modifications and tricks for the Yaesu FT-2000 by DK3HV

A 2m 70cm Dual Band J-Pole antenna for 35 USD. An excellent performing J-Pole type antenna, constructed from readily available materials.

Converting a PC Switching Power Supply to 13.5V by AA3SJ